- Aug 18, 2014
- 25,630
- 152,406
- Funster No
- 32,898
- MH
- Transit PVC
- Exp
- 16 years since restarting
The bit that causes the most traffic jams on a motorway is merging traffic at an on-slip. By having a lane gain instead of a merge, it massively increases the throughput of a junction. And if a large proportion of people leave at that junction, what's wrong with a lane drop? And it has the added bonus that it's cheaper because your junction overbridges don't need to be as long.
It only works if the motorway has enough lanes to start with .The M25 never did. It was always overloaded to the extent you stopped completely at every junction where the inside lane went off due to to many not wanting to exit & attempting to change to lane 2 ,which wasn't possible as both 2 & 3 were packed solid. I drove it regularly in the 90's. It was 80mph one minute then dead stop to get past the lane off/on junction.
At the end of the day if they had listened to the expert at planning it should have been only on/offs at major junctions with all others being off only to prevent junction hoppers & the school run.
Laughable. Here at busy sections we have 'reguge ' points every 500m. Which is the least you need in the UK.It's all well and good saying there are refuge points,
indicate & straight in to the lane. Upsets them but then they are overtaking so it is their duty to manage the manoeuvre .ok so you are on a three lane mway with two empty lanes to your right , it suddenly becomes a 4 lane and you can guarantee someone will immediately come up your inside as if to point out you should be there, when they could easily have overtaken you in the other two lanes. crazy