Latest Heathrow master plan
On 19/06/2019 14:03, Graeme Wall wrote:
On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. .... although no bridges in either junction will have to be rebuilt. -- Basil Jet recently enjoyed listening to Nine Horses - 2005 - Snow Borne Sorrow |
Latest Heathrow master plan
On 19/06/2019 18:02, Basil Jet wrote:
On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? -- Graeme Wall This account not read. |
Latest Heathrow master plan
On 19/06/2019 18:53, Graeme Wall wrote:
On 19/06/2019 18:02, Basil Jet wrote: On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? Unless you have sight problems, you can work out everything I know from the flickr image above. -- Basil Jet recently enjoyed listening to Nine Horses - 2005 - Snow Borne Sorrow |
Latest Heathrow master plan
On 19/06/2019 19:18, Basil Jet wrote:
On 19/06/2019 18:53, Graeme Wall wrote: On 19/06/2019 18:02, Basil Jet wrote: On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? Unless you have sight problems, you can work out everything I know from the flickr image above. I currently do have sight problems but that diagram clearly shows the slip roads from the new alignment being foul of the existing layout. I'm hoping to go and see the actual documents in the library tomorrow so may get a better idea then. -- Graeme Wall This account not read. |
Latest Heathrow master plan
On 19/06/2019 19:43, Graeme Wall wrote:
On 19/06/2019 19:18, Basil Jet wrote: On 19/06/2019 18:53, Graeme Wall wrote: On 19/06/2019 18:02, Basil Jet wrote: On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? Unless you have sight problems, you can work out everything I know from the flickr image above. I currently do have sight problems but that diagram clearly shows the slip roads from the new alignment being foul of the existing layout. I'm hoping to go and see the actual documents in the library tomorrow so may get a better idea then. The bridges are all in the centres of the junctions, and the roads in those area are unchanged, unlike the roads on the southern part of the M4 junction or the northern part of the T5 junction. (I'm not counting gantries as bridges.) -- Basil Jet recently enjoyed listening to Prefab Sprout - 1985 - Steve McQueen |
Latest Heathrow master plan
In message , at 20:09:11 on Wed, 19 Jun
2019, Basil Jet remarked: I currently do have sight problems but that diagram clearly shows the slip roads from the new alignment being foul of the existing layout. I'm hoping to go and see the actual documents in the library tomorrow so may get a better idea then. The bridges are all in the centres of the junctions, and the roads in those area are unchanged, unlike the roads on the southern part of the M4 junction or the northern part of the T5 junction. (I'm not counting gantries as bridges.) Talking of gantries; along with lamp-posts, central reservation barriers, and all the other street furniture, they'd have to be removed along the affected stretches to make the "set of points, with road cones swapping the flow overnight" operation postulated up-thread. -- Roland Perry |
Latest Heathrow master plan
On 19/06/2019 20:09, Basil Jet wrote:
On 19/06/2019 19:43, Graeme Wall wrote: On 19/06/2019 19:18, Basil Jet wrote: On 19/06/2019 18:53, Graeme Wall wrote: On 19/06/2019 18:02, Basil Jet wrote: On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? Unless you have sight problems, you can work out everything I know from the flickr image above. I currently do have sight problems but that diagram clearly shows the slip roads from the new alignment being foul of the existing layout. I'm hoping to go and see the actual documents in the library tomorrow so may get a better idea then. The bridges are all in the centres of the junctions, and the roads in those area are unchanged, unlike the roads on the southern part of the M4 junction or the northern part of the T5 junction. (I'm not counting gantries as bridges.) What about the sliproads? -- Graeme Wall This account not read. |
Latest Heathrow master plan
In article , Roland Perry
writes Presumably all the rerouting of traffic on the A14 project is going swimmingly, to a similar plan? All the bits I've seen have been. For example, the new temporary northwestbound entry slip at Bar Hill was done that way. There's lots of bits of new carriageway waiting to be connected (e.g. northwestbound between the services north of Bar Hill and the Swavesey intersection, though I think that's waiting for the Lolworth bridge to be completed). Or, for another example, the diversion of the westbound A14 loop on to the M11 (or possibly temporarily-not-M11). Or the diversion of the northwestbound A1307 between Girton and the new Dry Drayton roundabout. -- Clive D.W. Feather |
Latest Heathrow master plan
Graeme Wall wrote:
On 19/06/2019 18:02, Basil Jet wrote: On 19/06/2019 14:03, Graeme Wall wrote: On 19/06/2019 13:34, Recliner wrote: On Wed, 19 Jun 2019 12:24:15 +0100, Roland Perry wrote: In message , at 12:04:50 on Wed, 19 Jun 2019, Recliner remarked: I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). It's far too close to the intersection with the M4 for the geometry to work. Not only that, Heathrow's own information shows the M25 route undiverted (only local roads have new corridors): https://aec.heathrowconsultation.com...tes/5/2019/06/ P1-11-Local-Roads-Diverted.jpg Thanks for that. That map clearly confirms the M25 diversion to the west: it has a more pronounced curve under the runways than the current route. It's a small enough diversion not to need any changes to the M4 junction. I've overlaid a translucent Google Map view on top of the new map, and you can clearly see the diversion. https://www.flickr.com/photos/recliner/48091808766/in/dateposted-friend/lightbox/ That confirms it is going to be foul of the current interchange which is going to be less easy to adapt. ... although no bridges in either junction will have to be rebuilt. If the new layout is foul of the current junction how is that going to work? You first connect the completed new carriageway and its M4 slip road to the old slip road just before it splits into the east and west bound links. For the next few months, traffic heading for the M4 will be diverted to the new northbound carriageway, while through traffic will continue to use the existing carriageway. During this time, the new carriageway will be built through the old northbound slip road to connect to the ood carriageway. Again, there will be and closures for a few weeks and an overnight complete closure as the final connection is made. Southbound is easier, but, again, connecting traffic from the M4 might continue to use the old carriageway for a little while after the through M25 traffic has been diverted to the new carriageway. |
Latest Heathrow master plan
tim... wrote:
"Recliner" wrote in message ... On Wed, 19 Jun 2019 10:57:29 +0100, "tim..." wrote: "Recliner" wrote in message ... tim... wrote: "Recliner" wrote in message ... tim... wrote: "Recliner" wrote in message ... https://www.bbc.co.uk/news/business-48668001 well I don't know about the rest, but I for one think that the idea that people who have little or no business at the airport are going to have to suffer 5 years of disruption whilst they rebuild the M25 to create this Hub airport entirely unreasonable Why do you think M25 users will suffer five years of disruption? It's more likely to be a few night time closures or lane restrictions. they are going to put the whole road in a tunnel (presumably from the way it's described not by building a raft on top of it) how can that not cause major disruption? You've obviously not looked at the map, what is "The Map" - I guess there is one, but no I didn't get to see it (You can blame that on my out of date browser if the original article included a link) or read this thread. as one of the first to reply, that would have been difficult If you now read the thread, I pointed out that the buried/bridged motorway will be built on a new alignment, to the west of the current M25, so building it won't disrupt the existing motorway or flights. The plans that I can see show the new road so close that the idea that it wont disrupt the current M25 is fiction. Only the short period of linking the old carriageways and new diversion will cause any disruption, and that should be short (mainly a few days or weeks of lane closures, then a few hours of complete closure while the traffic is switched to the new route). If you think that they can link a new route into a current motorways by only diverting traffic for a few weeks then you have never seen how they do this IME they narrow the road where the connection is to be made for the full term of the works. They do this because they need access to the new road for construction vehicles - how else are they going to build it? They won't need access to the existing M25 to build the new structures to the west — why would they? They will only need lane closures for a few weeks at the connection points, as they physically link the new and old road surfaces. The only complication is at the northern point, as the new northbound carriageway will pass through the existing slip roads to the M4, so the connection will have to be in two phases. |
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