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-   -   Britains Crap Roads, Answers wanted (https://www.londonbanter.co.uk/london-transport/810-britains-crap-roads-answers-wanted.html)

iantheengineer November 8th 03 09:46 PM

Britains Crap Roads, Answers wanted
 

"Steve Firth" wrote in message
.. .
derek wrote:

Professor Unwin, I assure you that around here I can show you stone
(most likely millstone grit) walls that have deflected (The stones
have bent it's not that the all the motor joints have broken and the
wall is just a collection of stones in formation) by about an inch in
a 5 foot run under their own weight and the weight of the stones above
them.


I'm wondering what sort of engineer he is (service 'engineer'?) Any
engineer worth his salt knows that rock and glass both flow. On one
degree course that I know of engineering students were monitoring the
changes in the glass of the building that they worked in. Knowing that
glass and rock will deform and flow under pressure is essential for
civils. If they can't design around the known characteristics of the
material then they are **** all use to anyone.

--
Having problems understanding usenet? Or do you simply need help but
are getting unhelpful answers? Subscribe to: uk.net.beginners for
friendly advice in a flame-free environment.


The last time I did a structures design was many years ago, and it consisted
of a reinforced slab over a large underground chamber.

As I said my specialisms are traffic engineering and drainage engineering
and if you know more about these topics than mysled I would be very
surprised, as yet you havent shown any evidence to show that you are in
either way so your opinions are purely that, and not based on any study or
fact. You cant even talk the talk, never mind walk the walk



iantheengineer November 8th 03 09:50 PM

Britains Crap Roads, Answers wanted
 

"Paul Weaver" wrote in message
.. .
everyone knows the theory of public transport, however you are forgetting
the disadvantages of bus use, that's what puts most people off.



I dont think everyone does know the theory of public transport judging by
this NG comments so apologies for teaching you to suck eggs

Not forgetting the disadvantages at all, we all know that a bus does not
have the same attributes as car travel, but it can also be said to some
degree that cars do not have some of the qualities of public trasport. For
example in a town centre, parking can be a problem, not if you use the bus.

There are many issues revoloving around the reasons for why people choose
not to use public transport. The key is to identify these and redress them
to attract people back to them. No mean feat



iantheengineer November 8th 03 09:58 PM

Britains Crap Roads, Answers wanted
 

"derek" wrote in message
...
On Sat, 8 Nov 2003 13:33:26 -0000, "iantheengineer"
wrote:


"Paul Weaver" wrote in message
. ..
On Fri, 07 Nov 2003 22:23:48 +0000, iantheengineer wrote:

It doesnt need to for most of the commute

Ahh, so the bus splits into 72 parts at each end?


No not at all, and I would think that the theory behind it is obvious,

the
key to bus usage is modal interchange,


Is that your name for what we call a bus stop?


It can be but in its loosest and at the lowest level. a bus stop is
interchange between walking and the bus ride, but many forms of interchange
are being developed, such as cycle carrying facilities on buses and cycle
lockers at train stations to enable the change from say the bus to the cycle
to complete the last part of the journey

ie facilities to allow transfer from
opne mode of travel to another.


you mean you ride the bus to the bus stop, get off and walk the rest
of the way home.


I think I have answered this point above

Fotr the most part of the commute menay
people are travelling in the same direction however upon reaching the

very
last section of the journey and at the very start of the journey we all

live
and work in slightly different places, but we use the same main

corridors.
In cities, it is generally the case that most people can walk from their

bus
stop to their office. Complications arise for people who work to site

etc,
but for the most part many people are 9-5 approx and stay office bound.

IF
you carry out any o-d survey you will see that certain routes are

trafficked
by people from the same areas going to the same areas, and it is for

these
that public transport works.


Buses may be OK if you work in the centre of a city and live in a
suburb of that same city near to an arterial road to the city centre
and are lucky (the bus stop being near to your house). If you live in
one suburb and work in another you can forget about PT.


I agree but it is only because all of the other people are using cars as
well that makes the provision of PT unviable

The main problem with public transport is the
effective routing.


You're wrong there the main problem with public transport is the
dreich people you have to share your space with. The last time I used
a bus there was a man in a dirty shabby mac sat next to me, smelling
of wee, his face covered in sores, and a "dewdrop" glistening on the
end of his nose like a pearl.



True this is a problem but not an entirely insurmountable one

In order to make it profitable a bus must collect x
punters to make the service profitable,


cloudy thinking, what has profitability to do with it? It is the
function of the bus to pick up and carry passengers. The bus must pick
up passengers - period, or it might as well stay in the depot all day.



Why operate a service in the deregulated system if it isnt profitable???

No company would, ask any community transport group who have to fill in the
gaps that PT is missing

in order to do this sometimes it is
necessary to protract the route to serve a certain catchment


Second thoughts you're right, a public transport system that didn't
have to pick up passengers would run much more efficiently. Another
example of the travelling public being unreasonable.

and by doing
this it incurrs delays compared to the direct route of using the car, but

,
by many people using their cars they create delays through traffic
congestion. Bus lanes assist to redress this balance a litlle, but at
present do not provide sufficient advantage to make the bus seem

attractive.

Correct, it would take *some* doing.



I agree we have a long way to go with the public transport system, but we
have to start somewhere. The fiirst issue is to get them efficient and
on-time so that people can rely on them. Secondly to make them more cost
effective to give cheaper fares. Thirdly to improve the quality of the ride
and interchange facilities, this includes having to sit next to Mr Dew drop
who hasnt washed this week.

If these issues were resolved and I had a bus available for my journey to
work I would use it.

DG




iantheengineer November 8th 03 10:01 PM

Britains Crap Roads, Answers wanted
 

"NM" wrote in message
m...
iantheengineer wrote:

"NM" wrote in message
m...

iantheengineer wrote:


How fast would urban public transport be with no cars
on the road? (and no vans, cycles, taxis etc. if that helps).



Is this a question, is it not obvious enough.

It will be exactly the travel time + the stops for pick up/drop off,


without

any delay occurring due to congestion, and there would be no need for


bus

lanes!

Without busses and bus lanes there would be even less congestion.




How many cars does it take to move 72 people, at say 5 seats per car 15,
okay and what area does a car take up 5.75m by 2.5m roughly so 14.4m2

times
15 = 216m2, and what area does a double decker take 12.9m long by 2.5m =
32.25m2, hmm I need say no more.



Take off your rose tinted's and actually look at your average bus,
usually about 5 or less passengers, I went from Cheltenham to London by
coach the other day, there were as many passengers as I could get in my
car with seats left over.


Okay many routes have this, but it is purely because the services are not
reviewed. If the PT companies are operating like most businesses, they will
supply to satisfy a demand, and in the case you are talking of demand was
low. Perhaps thsi was a small blip and it normally has more passengers, but
the bus will not continue if they have no passengers unless under some sort
of subsidised agreement.



iantheengineer November 8th 03 10:03 PM

Britains Crap Roads, Answers wanted
 

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...

Under the assumption that there are no cars, vans, bikes
would there still be congestion? Assume the usage is the
same as the total passenger km as on an urban bus route
at the moment, and whatever bus frequency is optimal
(which I expect to be at least 30 buses in the peak hour).

Its an unanswerable question as it depends upon link and junction

capacities
so each location is different.,


You can not say whether there would be congestion
when the only traffic on the road is buses?
Or you can not say whether the PT travel speed in
ideal conditions is any better than it is at the moment?

but it is fair to say that the throughput of
people would be greater so congestion would a lot less than it is at

present

Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?



Per lane the maximum throughput of a lane for buses is 900 vehicles per
hour. This is purely a lane capacity in pcu (passenger car units) that
relates a bus to equal 2 passnger car units. An average lane has a capacity
of 1800 pcu, although this depends upon width gradient and alignment.



iantheengineer November 8th 03 10:06 PM

Britains Crap Roads, Answers wanted
 

"derek" wrote in message
...
On Sat, 8 Nov 2003 14:02:15 -0000, "iantheengineer"
wrote:


"Clive" wrote in message
...
In message , Grant Crozier
writes
With a bit of luck in eighteen months time the UK will be governed by
a decent party with a man at the helm who knows what he is doing .
First of all, they've got to find one.
--
Clive



Not the conservatives then


Not unless the NHS, Education, Railway chickens come home to roost for
Labour or there's another monumental cockup like Foot & mouth.

Are you a betting man?

DG


I cant see the cons getting in this time, people still remeber the Thatcher
days and it is this that is keeping labour in power.

Although Labour seemed to have lost support over the Iraq invasion so who
knows

God help us



Paul Smith November 8th 03 10:12 PM

Britains Crap Roads, Answers wanted
 
On Sat, 8 Nov 2003 22:43:22 -0000, "iantheengineer"
wrote:

You're a TRAFFIC ENGINEER?


God save us all.


Okay Paul what are your views and ideas


Seriously?

Let the market decide. It will anyway.

All this modern interference wastes resources.

Transport engineering is about facilitating choice, not restricting
it.
--
Paul Smith
Scotland, UK
http://www.safespeed.org.uk
please remove "XYZ" to reply by email
speed cameras cost lives

Niklas Karlsson November 8th 03 10:17 PM

Britains Crap Roads, Answers wanted
 
In article , derek wrote:

Buses may be OK if you work in the centre of a city and live in a
suburb of that same city near to an arterial road to the city centre
and are lucky (the bus stop being near to your house). If you live in
one suburb and work in another you can forget about PT.


Really? I live in one suburb and work in another. (I will admit both are
in Greater London, but I don't think this changes the base assumptions
of these arguments.) PT works just fine for my commute.
It's a little slower than driving would be, but not bad at all. I can
either use two bus routes or a train and a bus route.

Niklas
--
For my birthday I got a humidifier and a de-humidifier...I put them in the same
room and let them fight it out.
-- Steven Wright

Robin May November 8th 03 10:18 PM

Britains Crap Roads, Answers wanted
 
"iantheengineer" wrote the following
in:

I cant see the cons getting in this time, people still remeber the
Thatcher days and it is this that is keeping labour in power.


Me neither. Michael Howard? Ha! They'd have better luck if they brought
Maggie herself back.

--
message by Robin May, but you can call me Mr Smith.
Hello. I'm one of those "roaring fascists of the left wing".

Then and than are different words!

Terry Harper November 8th 03 10:18 PM

Britains Crap Roads, Answers wanted
 
"Steve Firth" wrote in message
.. .

I'm wondering what sort of engineer he is (service 'engineer'?) Any
engineer worth his salt knows that rock and glass both flow. On one
degree course that I know of engineering students were monitoring the
changes in the glass of the building that they worked in. Knowing that
glass and rock will deform and flow under pressure is essential for
civils. If they can't design around the known characteristics of the
material then they are **** all use to anyone.


If they were looking for flow in soda-lime glass at ambient temperatures
they were in for a long wait. It will bend, and it does suffer from stress
corrosion if stretched under load below the breaking stress, which
ultimately can lead to failure, but flow it will not unless you heat it to a
temperature at which it has an appropriate viscosity.

Note that many plastics have glass transition points below ambient
temperature, and behave like glasses below that temperature.
--
Terry Harper
http://www.terry.harper.btinternet.co.uk/


Paul Weaver November 8th 03 11:10 PM

Britains Crap Roads, Answers wanted
 
On Sat, 08 Nov 2003 22:50:13 +0000, iantheengineer wrote:
I dont think everyone does know the theory of public transport judging by
this NG comments so apologies for teaching you to suck eggs


Most people know the theory, however argue its not practical in many cases

Not forgetting the disadvantages at all, we all know that a bus does not
have the same attributes as car travel, but it can also be said to some
degree that cars do not have some of the qualities of public trasport.
For example in a town centre, parking can be a problem, not if you use
the bus.


Indeed, and IMO only dumbasses and people working weird shifts would
consider using private transport in London, especially in zone 1. My car
is currently on a long term holiday in Greece, and will stay there for as
long as I'm working in the hellhole that is London.

However in many cases people dont live in dense enough Areas to allow
public transport. I'm more of a fan of parkway stations on motorway
networks, offering direct speedy (70mph+) access to the center of towns,
with easy interchange to a local light-rail system taking you Direct to
your destination.

There are many issues revoloving around the reasons for why people
choose not to use public transport. The key is to identify these and
redress them to attract people back to them. No mean feat


convenience, comfort, privacy

Getting a seat in the morning, a table and power point for laptop on long
distance trains, intergration so I'm not waiting for connections,
cleanliness of trains, comfort of the ride, reliability

I wont use buses because they are stop-start all the time for busstops,
the drivers can't drive to save their life, and of course the smelly scum
that sit on you. Oh, and the peak theoretical speed is 30mph, average
is about 5-10mph.

Nick Finnigan November 8th 03 11:28 PM

Britains Crap Roads, Answers wanted
 
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?


Per lane the maximum throughput of a lane for buses is 900 vehicles per
hour. This is purely a lane capacity in pcu (passenger car units) that
relates a bus to equal 2 passnger car units. An average lane has a capacity
of 1800 pcu, although this depends upon width gradient and alignment.


But if they have to stop to pick up customers,
what is the achieved passenger throughput?



JNugent November 8th 03 11:32 PM

Britains Crap Roads, Answers wanted
 
wrote:

a bus stop is
interchange between walking and the bus ride, but many forms of
interchange are being developed, such as cycle carrying facilities on
buses and cycle lockers at train stations to enable the change from
say the bus to the cycle to complete the last part of the journey


Is that for rainy days?



Philip Bradshaw November 9th 03 01:12 AM

Britains Crap Roads, Answers wanted
 
"iantheengineer" wrote in message
...
snip

We could go on forever but suffice to say not all things work under the

same
rules, yes perhaps rock was a poor example due to the issue of it being

lava
when in a super heated stat, but to go by your theories we would only need
one mathematical formula to solve all of the worlds issues and this isnt

the
case, ask any mathematician.


Nicolis & Prigogine?
Waldrop?
Stewart?

ok, not quite the /one formula/;
yet...


Philip Bradshaw November 9th 03 01:14 AM

Britains Crap Roads, Answers wanted
 

"Steve Firth" wrote in message
. ..
iantheengineer wrote:

I actually work for a consultancy and not a local authority,


Name them so I can cross them off the list of places we do business
with.

Sounds like a good move; my understanding is that anyone still using pcu is
a tad out-dated.


derek November 9th 03 10:18 AM

Britains Crap Roads, Answers wanted
 
On 08 Nov 2003 23:17:06 GMT, Niklas Karlsson wrote:

In article , derek wrote:

Buses may be OK if you work in the centre of a city and live in a
suburb of that same city near to an arterial road to the city centre
and are lucky (the bus stop being near to your house). If you live in
one suburb and work in another you can forget about PT.


Really? I live in one suburb and work in another. (I will admit both are
in Greater London, but I don't think this changes the base assumptions
of these arguments.)


Oh, but it does. Very few cities in the world have a PT network on the
scale of London, combined with a horrific traffic problem for cars. If
If I live in one suburb and work in the next one along I have to wait
for a bus into town, walk to the next bus stop and wait for a bus out
of town to get to work. Three times the distance and twice the
waiting. Maybe 1 hour 20 minutes. In a car it's just 10-15 mins.

PT works just fine for my commute.
It's a little slower than driving would be, but not bad at all. I can
either use two bus routes or a train and a bus route.


You're lucky!


Niklas



DG

iantheengineer November 9th 03 10:24 AM

Britains Crap Roads, Answers wanted
 

"Steve Firth" wrote in message
. ..
iantheengineer wrote:

What are you then Steve,


Well known.

or shall we go all defensive again


SInce I haven't been "defensive" how can I be "defensive again"?

BTW, only loonies post four followups to the same post, and only
****wits quote the entire post that they are replying to, including the
sig, to add a one line comment.

--
Having problems understanding usenet? Or do you simply need help but
are getting unhelpful answers? Subscribe to: uk.net.beginners for
friendly advice in a flame-free environment.


Not defensive!!

You have a very strange view of the world, please note I have not had to
resort to expletives to make a point unlike you, not defensive, with
replsies like whats the F** has it to do with you? you could have merely not
answered. And anyway your the one with all of the extraneous crap on the end
of every message. God you really do need a good kicking



iantheengineer November 9th 03 10:34 AM

Britains Crap Roads, Answers wanted
 

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?


Per lane the maximum throughput of a lane for buses is 900 vehicles per
hour. This is purely a lane capacity in pcu (passenger car units) that
relates a bus to equal 2 passnger car units. An average lane has a

capacity
of 1800 pcu, although this depends upon width gradient and alignment.


But if they have to stop to pick up customers,
what is the achieved passenger throughput?



You cant really say this globally as it depends upon the density of stops,
the number of people alighting etc.

Its got to be higher than the car figure at any rate as the car lane
capacity is 1800 pcu so thats 1800 cars per hour at say 2 people per car
(that is very generous!) giving 3600 persons per hour. Say a bus achieved
1/3 capacity of 72 sealts ie 24, and they have a lane capacity of 900 buses
per hour you are talking 21600 passenger throughput, taking out say 15
minutes of the hour to be ultra generous to the car argument you are looking
at 16200 which is far in excess of the 3600 car argument, and I have been
generous to the car argument and have taken a pessimistic view of the buses.



iantheengineer November 9th 03 10:36 AM

Britains Crap Roads, Answers wanted
 

"Robin May" wrote in message
. 1.4...
"iantheengineer" wrote the following
in:

I cant see the cons getting in this time, people still remeber the
Thatcher days and it is this that is keeping labour in power.


Me neither. Michael Howard? Ha! They'd have better luck if they brought
Maggie herself back.

--
message by Robin May, but you can call me Mr Smith.
Hello. I'm one of those "roaring fascists of the left wing".

Then and than are different words!


Perhaps so she seems to have plenty of supporters in this NG! and I am
certainly not one of them!!



JNugent November 9th 03 10:44 AM

Britains Crap Roads, Answers wanted
 
wrote:

"Nick Finnigan" wrote:


"iantheengineer" wrote:


"Nick Finnigan" wrote:


but what would
you expect the maximum PT throughput per lane to be?


Per lane the maximum throughput of a lane for buses is 900 vehicles
per hour. This is purely a lane capacity in pcu (passenger car
units) that relates a bus to equal 2 passnger car units. An average
lane has a capacity of 1800 pcu, although this depends upon width
gradient and alignment.


But if they have to stop to pick up customers,
what is the achieved passenger throughput?


You cant really say this globally as it depends upon the density of
stops, the number of people alighting etc.


Fair enough.

Its got to be higher than the car figure at any rate as the car lane
capacity is 1800 pcu so thats 1800 cars per hour at say 2 people per
car (that is very generous!) giving 3600 persons per hour. Say a bus
achieved 1/3 capacity of 72 sealts ie 24, and they have a lane
capacity of 900 buses per hour you are talking 21600 passenger
throughput, taking out say 15 minutes of the hour to be ultra
generous to the car argument you are looking at 16200 which is far in
excess of the 3600 car argument, and I have been generous to the car
argument and have taken a pessimistic view of the buses.


That isn't right. That a bus lane could handle 900 buses an hour may be
theoretically possible, but there is no highway in the UK (probably in the
world) which carries 900 buses or bus movements an hour - probably nowhere
near that many in a *day* (where I live, which is on a bus rouite, it
doesn't approach that figure in a week). So you are being very optimistic in
the case of buses, and not pessimistic at all.



Paul Weaver November 9th 03 10:51 AM

Britains Crap Roads, Answers wanted
 
On Sun, 09 Nov 2003 11:18:08 +0000, derek wrote:
Oh, but it does. Very few cities in the world have a PT network on the
scale of London, combined with a horrific traffic problem for cars. If


And here lies the problem. Most PT supporters live in London, and don't
realise how lucky they Are to Have such a reliable and extensive PT
network.

Niklas Karlsson November 9th 03 11:15 AM

Britains Crap Roads, Answers wanted
 
In article , Paul Weaver wrote:
On Sun, 09 Nov 2003 11:18:08 +0000, derek wrote:
Oh, but it does. Very few cities in the world have a PT network on the
scale of London, combined with a horrific traffic problem for cars. If


And here lies the problem. Most PT supporters live in London, and don't
realise how lucky they Are to Have such a reliable and extensive PT
network.


I've only lived in London for seven months. Prior to that I lived in a
town of 50K; admittedly not in the UK. Bus coverage was similar there.

Niklas
--
Who is this Time Being and why are people always doing things for him/her?

Neil Williams November 9th 03 11:42 AM

Britains Crap Roads, Answers wanted
 
On 09 Nov 2003 12:15:52 GMT, Niklas Karlsson wrote:

I've only lived in London for seven months. Prior to that I lived in a
town of 50K; admittedly not in the UK. Bus coverage was similar there.


Outside the UK (certainly in Western Europe), bus services tend to be
run sensibly. In the UK, London is the only place with a proper
planned, useful, well-run and good-value bus network. This is because
it was the only place in which deregulation was not carried out,
probably because the politicians all live/work there.

Try a similarly-sized town in the UK, and you'll see the picture is
not nearly as rosy. In Milton Keynes, while there have been a few
welcome improvements to evening/Sunday services recently, it is a sick
joke. I understand it is far worse elsewhere.

Neil

--
Neil Williams
is a valid email address, but is sent to /dev/null.
Try my first name at the above domain instead if you want to e-mail me.

Nick Finnigan November 9th 03 11:44 AM

Britains Crap Roads, Answers wanted
 
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?


But if they have to stop to pick up customers,
what is the achieved passenger throughput?


You cant really say this globally as it depends upon the density of stops,
the number of people alighting etc.


You are free to choose the optimal density of stops,
but please explain what that is. For simplicity, I would
go with your assumption that everyone alights at the
city-centre bus-station near their office.

. Say a bus achieved
1/3 capacity of 72 sealts ie 24, and they have a lane capacity of 900 buses
per hour you are talking 21600 passenger throughput, taking out say 15
minutes of the hour


Even at a bus every 5 seconds I don't see how you
can pick up any passengers; if any bus actually stops,
all the following buses would have to.






Paul Weaver November 9th 03 11:44 AM

Britains Crap Roads, Answers wanted
 
On Sun, 09 Nov 2003 12:15:52 +0000, Niklas Karlsson wrote:

In article , Paul Weaver wrote:
On Sun, 09 Nov 2003 11:18:08 +0000, derek wrote:
Oh, but it does. Very few cities in the world have a PT network on the
scale of London, combined with a horrific traffic problem for cars. If


And here lies the problem. Most PT supporters live in London, and don't
realise how lucky they Are to Have such a reliable and extensive PT
network.


I've only lived in London for seven months. Prior to that I lived in a
town of 50K; admittedly not in the UK. Bus coverage was similar there.


I've lived in this pile of **** for a couple of months, before that I
lived in a city of 100k, with a crumbling bus infrastructure, and before
That a town of 120k where it took 45 minutes to get to the centre, and
another 20 minutes to get to the cinema. 6 miles an hour?

Until you live With 2 buses an hour (maximum) from 7-5, and thats it, you
can't say jack. And that's actually good compared with most areas of the
UK.


Niklas Karlsson November 9th 03 11:46 AM

Britains Crap Roads, Answers wanted
 
In article , Paul Weaver wrote:

I've lived in this pile of **** for a couple of months, before that I
lived in a city of 100k, with a crumbling bus infrastructure, and before
That a town of 120k where it took 45 minutes to get to the centre, and
another 20 minutes to get to the cinema. 6 miles an hour?


Nice.

Until you live With 2 buses an hour (maximum) from 7-5, and thats it, you
can't say jack.


How does that follow?

And that's actually good compared with most areas of the UK.


So I'm told, and I have no problems believing it after a stay in the
West Country not too long ago, before moving here.

Niklas
--
"Kids have it easy today. All they have to listen to is stories about how back
in the '70s we had to listen to stories about how bad it was back in the '30s."
-- Keith Lynch

Ian Henden November 9th 03 01:04 PM

Britains Crap Roads, Answers wanted
 

"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

To continue to build roads will continue the problem. The answer

is
puvblic
transport, but public transport cannot cater for all journeys and
therefore
over time journeys will need to become more corridored. For

example
go
into
any city during the am peak and the tidality of the flow is there

to
be
seen. IF we were to get all of the people from their cars onto

public
transport, or even better living nearer to the workplace, the

congestion
would be far less.

cars. Without cars on the urban road network public transport

would
be
faster and more reliable.

How fast would urban public transport be with no cars
on the road? (and no vans, cycles, taxis etc. if that helps).

Is this a question, is it not obvious enough.

It will be exactly the travel time + the stops for pick up/drop off,

without
any delay occurring due to congestion,


And what will the travel speed be, and who long will
each stop take, and how frequently will the stops occur?
Or, alternatively, how fast would a typical journey be?




Well this depends upon the usage the frequency of buses, the congestion
levels. The reason for the introduction of bus lanes at intersections was

to
advance the bus to the front of the queues thus gaining back on the

journey
speed to make up for stops.


And the bus lanes are useless, because they are full of prats in cars
queuing to turn left or go straight on at the lights....





Niklas Karlsson November 9th 03 01:30 PM

Britains Crap Roads, Answers wanted
 
In article , Paul Weaver wrote:
On Sun, 09 Nov 2003 12:46:16 +0000, Niklas Karlsson wrote:

How does that follow?


Assuming most people in this country live with a London, or foreign, Style
bus service is stupid, yet PT fans constantly believe that population
density is high enough


Eh? I have made no such assumption.

Niklas
--
"From what I've seen the majority of computer users are more interested in the
tool they have sitting in their laps than anything else."
-- Bill Pechter

Paul Weaver November 9th 03 01:38 PM

Britains Crap Roads, Answers wanted
 
On Sun, 09 Nov 2003 14:04:55 +0000, Ian Henden wrote:
And the bus lanes are useless, because they are full of prats in cars
queuing to turn left or go straight on at the lights....


TBH I hardly see cars in bus lanes, they are usually just empty lanes.

Paul Weaver November 9th 03 01:40 PM

Britains Crap Roads, Answers wanted
 
On Sun, 09 Nov 2003 12:46:16 +0000, Niklas Karlsson wrote:

In article , Paul Weaver wrote:

I've lived in this pile of **** for a couple of months, before that I
lived in a city of 100k, with a crumbling bus infrastructure, and before
That a town of 120k where it took 45 minutes to get to the centre, and
another 20 minutes to get to the cinema. 6 miles an hour?


Nice.

Until you live With 2 buses an hour (maximum) from 7-5, and thats it, you
can't say jack.


How does that follow?#


Assuming most people in this country live with a London, or foreign, Style
bus service is stupid, yet PT fans constantly believe that population
density is high enough

Paul Weaver November 9th 03 01:41 PM

Britains Crap Roads, Answers wanted
 
On Sun, 09 Nov 2003 12:02:49 +0000, Huge wrote:

Paul Weaver writes:
On Sun, 09 Nov 2003 11:18:08 +0000, derek wrote:
Oh, but it does. Very few cities in the world have a PT network on the
scale of London, combined with a horrific traffic problem for cars. If


And here lies the problem. Most PT supporters live in London, and don't
realise how lucky they Are to Have such a reliable and extensive PT
network.


Reliable?


In comparison to other towns and cities

iantheengineer November 9th 03 02:33 PM

Britains Crap Roads, Answers wanted
 

"JNugent" wrote in message
...
wrote:

"Nick Finnigan" wrote:


"iantheengineer" wrote:


"Nick Finnigan" wrote:


but what would
you expect the maximum PT throughput per lane to be?


Per lane the maximum throughput of a lane for buses is 900 vehicles
per hour. This is purely a lane capacity in pcu (passenger car
units) that relates a bus to equal 2 passnger car units. An average
lane has a capacity of 1800 pcu, although this depends upon width
gradient and alignment.


But if they have to stop to pick up customers,
what is the achieved passenger throughput?


You cant really say this globally as it depends upon the density of
stops, the number of people alighting etc.


Fair enough.

Its got to be higher than the car figure at any rate as the car lane
capacity is 1800 pcu so thats 1800 cars per hour at say 2 people per
car (that is very generous!) giving 3600 persons per hour. Say a bus
achieved 1/3 capacity of 72 sealts ie 24, and they have a lane
capacity of 900 buses per hour you are talking 21600 passenger
throughput, taking out say 15 minutes of the hour to be ultra
generous to the car argument you are looking at 16200 which is far in
excess of the 3600 car argument, and I have been generous to the car
argument and have taken a pessimistic view of the buses.


That isn't right. That a bus lane could handle 900 buses an hour may be
theoretically possible, but there is no highway in the UK (probably in the
world) which carries 900 buses or bus movements an hour - probably nowhere
near that many in a *day* (where I live, which is on a bus rouite, it
doesn't approach that figure in a week). So you are being very optimistic

in
the case of buses, and not pessimistic at all.



If you read the earlier posts it is theoretical, the question asked was how
many buses *could* you get through a lane.



iantheengineer November 9th 03 02:50 PM

Britains Crap Roads, Answers wanted
 

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?

But if they have to stop to pick up customers,
what is the achieved passenger throughput?


You cant really say this globally as it depends upon the density of

stops,
the number of people alighting etc.


You are free to choose the optimal density of stops,
but please explain what that is. For simplicity, I would
go with your assumption that everyone alights at the
city-centre bus-station near their office.

. Say a bus achieved
1/3 capacity of 72 sealts ie 24, and they have a lane capacity of 900

buses
per hour you are talking 21600 passenger throughput, taking out say 15
minutes of the hour


Even at a bus every 5 seconds I don't see how you
can pick up any passengers; if any bus actually stops,
all the following buses would have to.






The same argument can be used for any mode though if a single lane with no
overtaking is installed as all traffic will be delayed due to stops by any
vehicle. This is why we have bus laybys in many places to prevent this.You
could argue that the car is less effective at this as it stops and can only
let a maximum of 4 people off before resuming the journey. A bus stops in
only a slightly longer timestep and can let a maximum of 72 people depart,
before it can set off So effectively you have the stop the depart and the
set off elements to measure. The stopping and departing are going to be
similar with a couple of extra seconds for the bus, but the efficiency of
the stop is far greater allowing a greater passenger per second exit ratio.

It is known that the bus service always seems to operate on no buses for
ages then a fleet come along at once and this is due to the fact that people
alighting on the first bus delay it so that the headway between it and the
following bus reduces, and so on until the first bus is full and perhaps
skips a few stops, and then the second bus will take over until the first
bus is able to stop again. But if the system were saturated the first bus
would load up and set off then the second would load up and set off and so
on, and the headways would remain overall similar with smaller variation.





iantheengineer November 9th 03 02:52 PM

Britains Crap Roads, Answers wanted
 

"Ian Henden" wrote in message
...

"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

"Nick Finnigan" wrote in message
...
"iantheengineer" wrote in message
...

To continue to build roads will continue the problem. The answer

is
puvblic
transport, but public transport cannot cater for all journeys

and
therefore
over time journeys will need to become more corridored. For

example
go
into
any city during the am peak and the tidality of the flow is

there
to
be
seen. IF we were to get all of the people from their cars onto

public
transport, or even better living nearer to the workplace, the

congestion
would be far less.

cars. Without cars on the urban road network public transport

would
be
faster and more reliable.

How fast would urban public transport be with no cars
on the road? (and no vans, cycles, taxis etc. if that helps).

Is this a question, is it not obvious enough.

It will be exactly the travel time + the stops for pick up/drop off,

without
any delay occurring due to congestion,

And what will the travel speed be, and who long will
each stop take, and how frequently will the stops occur?
Or, alternatively, how fast would a typical journey be?




Well this depends upon the usage the frequency of buses, the congestion
levels. The reason for the introduction of bus lanes at intersections

was
to
advance the bus to the front of the queues thus gaining back on the

journey
speed to make up for stops.


And the bus lanes are useless, because they are full of prats in cars
queuing to turn left or go straight on at the lights....





They are only useless if abused, many local authorities are now introducing
cameras on buses to poilce the abuse. If bus lanes are clear as they are
supposed to be then they do work.



iantheengineer November 9th 03 02:54 PM

Britains Crap Roads, Answers wanted
 

"Paul Weaver" wrote in message
.. .
On Sun, 09 Nov 2003 14:04:55 +0000, Ian Henden wrote:
And the bus lanes are useless, because they are full of prats in cars
queuing to turn left or go straight on at the lights....


TBH I hardly see cars in bus lanes, they are usually just empty lanes.


Yep and so they should be and eventually when we all get fed up with sitting
at the lights in a a mile long queue as the bus sails by on the inside lane
we may start to think, how about taking the bus. If all the people that
could use buses used buses everyone else who couldnt would have an easier
time of it, but we have this mentality were we all *need* our car and cant
possibly use PT or a sustainable transport mode.



Chris Jones November 9th 03 03:05 PM

Britains Crap Roads, Answers wanted
 
To commute is to waste, in both time and resources, the more we
reduce commuting the easier it will be for the people who have
to travel to get around.


True. Nobody likes commuting to work, I'd rather not have to do it. But with
the way the job market is these days, I can't just keep moving house every
time I change jobs, or I'd never get the chance to settle down anywhere.



Chris Jones November 9th 03 03:09 PM

Britains Crap Roads, Answers wanted
 
We cant travel if the rate of increase in traffic continues

Traffic has only increased at the same rate as the number of driving license
holders has increased - due largely to women getting their own cars more
these days.

Once the number of license holders flattens out (which it will in due
course), traffic should stop increasing so fast. If we built a decent road
network now, it might be able to serve us forever.



Chris Jones November 9th 03 03:12 PM

Britains Crap Roads, Answers wanted
 
Speed humps slow drivers down thus making accidents less likely and
less severe.


Not necessarily - they slow down for each hump and speed up in between - so
they may well be going faster in between the humps than they would be if the
humps weren't there.

As for speed limit in force at all times well if it wasnmt drivers would

get
confused, and is travelling at 20 over that distance such a problem??.


But as it's the school run parents who are usually the ones responsible for
speeding outside schools, surely having a 24/7 20-limit is wasteful and
unnecessary?



Neil Williams November 9th 03 03:12 PM

Britains Crap Roads, Answers wanted
 
On Sun, 9 Nov 2003 15:50:32 -0000, "iantheengineer"
wrote:

It is known that the bus service always seems to operate on no buses for
ages then a fleet come along at once and this is due to the fact that people
alighting on the first bus delay it so that the headway between it and the
following bus reduces, and so on until the first bus is full and perhaps
skips a few stops, and then the second bus will take over until the first
bus is able to stop again. But if the system were saturated the first bus
would load up and set off then the second would load up and set off and so
on, and the headways would remain overall similar with smaller variation.


It's much more boarding (and ticket sales) rather than alighting that
causes this problem; if off-bus ticketing were the norm (outside
London), and all buses larger than van-derived minibuses were fitted
with two sets of doors, this would be significantly reduced.

Neil

--
Neil Williams
is a valid email address, but is sent to /dev/null.
Try my first name at the above domain instead if you want to e-mail me.

Chris Jones November 9th 03 03:15 PM

Britains Crap Roads, Answers wanted
 
When North sea gas runs out, what are we going to do then to replace
it, the best source of heat for the community.


http://news.bbc.co.uk/1/hi/business/3161414.stm




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