Alistair J Murray
I would really like to know of any other UK rural junctions with high speed trunk roads that match this description. That is a simple straight across crossroads (not staggerered) over a fast dual carriageway.
A 20mph limit 5040I am quite willing to concede that the limit within the zone is indeed 20mph - TSRGD 2002 does include signs to diagram 674 in the list of those which mark...
Here is my own ranking based mainly on the number of seconds you are in direct conflict with fast traffic and weighted slightly for difficulty.
D Left turn from major L1 into minor A Left turn into acceleration lane merge with traffic F Right turn from major road via gap into minor road B Left turn into L1 N Straight across major road via gap G Right turn from minor road via gap into acceleration lane H Right turn from minor road via gap into L1 J U turn on major road L2 via gap into acceleration lane K U turn on major road L2 via gap into L1 M U turn left into side road U turn there then right to L1 * L U turn on major road L2 via gap into L2 I Right turn from minor road via gap into L2 C Left turn into L2 E Left turn from major L2 into minor
We can haggle about the order of the last 4.
Good idea. I reckon it is:
DAFBN(G)H(J)KM*LICE
Using the opposite side acceleration lane could be fair game - especially with a long or slow vehicle, but you need to be absolutely sure that there is not going to be anything in it when you get there. It is very annoying to have someone sweep ahead of you into the acceleration lane from the central gap.
All the movements to or from L2 on our junction have initiated KSI events. It stands out. And some of them beggar belief.
One possible conclusion is that making a right turn (or U turn) onto a very fast road is much more difficult than most people realise. Drivers sometimes go for too short gaps where they are utterly dependent on the mainline traffic taking evasive action.
Strangely not. About 30% are T-boned but mostly when crossing a lane. The rest include mixtures of loss of control, white line overrun, tailgating into the junction and completely insane traffic movements. And there is an inexplicable asymmetry to the accident pattern.
Level shifts mean that you can only see the central gap road markings from one side of the road but it is on that side that most accidents are initiated. A layby just before on the Nbound side doesn't help either. People pulling out into the path of oncoming vehicles also get counted against the junction since that is where their wreckage comes to rest.
Regards, Martin Brown
