On Tue, 11 Jan 2005 10:47:21 +0000 (UTC), "Terry Harper"
wrote:

Really the answer is to provide an extra lane between junctions, so that
there is never any need to merge off a slip road.

I don't like that when driving a slower vehicle (e.g. a minibus)
because it means you are forever moving back and forth. I think most
lorry drivers would probably agree - unless such lanes were
permanently marked with dotted lines to be for turning vehicles only.

The solution is just to have a slip road such that the
slowest-accelerating vehicle you're likely to get on a motorway (say,
an oldish, heavily-laden lorry) can accelerate safely to the
prevailing speed of the inside lane (let's say 60mph or so) without
going absolutely flat out.

That would probably, I'd say, involve doubling the length of a good
proportion of existing sliproads with an upwards slope to motorway
level (the downward ones obviously assisting with acceleration), and
tripling the length of all sliproads which have a give way just before
the motorway is met (such as older services stations). Planning the
merge would also be easier with a longer period alongside the motorway
itself.

To merge traffic safely on the motorway, drivers (even of slower
vehicles) shouldn't need to be slamming through their gears attempting
to accelerate to the prevailing speed when they should be already
thinking about the actual merge.

Neil

--
Neil Williams in Milton Keynes, UK
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