M25 avoinding Chiswick Roundabout?

Question

I need to get onto the M25 tonight from North West London, and I am trying to avoid the Chiswick roundabout and the two hours of congestion which is inevitable round there. I am sure there is a way onto the M25 from the M40, but I do not have a road map to hand.

Am I right, is there a way on to the M25 via the M40? If so what junction is it? I will be heading south.

Many thanks

Answer 1

Yes, the A40 turns into the M40 and crosses the M25. Don;t know the junction, but you won;t miss it it's a huge junction well sign posted.

Answer 2

The junction you are looking for is J15/4B. Leave north west London via the A40. This turns into the M40 which will cross the M25.

Answer 3

The M25 junction is shortly after the A40 turns into the M40 as it passes over the Denham roundabout. Make sure you stay well to the left and be careful because you have to move over and merge with lane one which is full of traffic coming up off the Denham roundabout and onto the motorway.

Answer 4

You don't say where you need to go from the M25,
but if your in North West london it is easier to get on the A40 and cross down south via A312 (signed to Yeading & Hayes) to junction 3 of M4. It is then a short distance to the M25.
You then avoid the bulk of the Heathrow traffic.
It is the route I use regularly to Gatwick and takes approx 1and half hours door to door from NW6 without a panic.

Answer 5

The Junction is M25 Jct 16 and M40 Jct 1a.

Answer 6

Yep - just drive up the M40. The M25 is BIG....you won't miss it.

Answer 7

Yeah there is, but unless things have changed dramatically since I was last there, you'll get about as much congestion heading out of London on the A 40....

Answer 8

The route planner at http://www.rac.co.uk/web/routeplanner/?&lid=leftNav&lpos=routeplanner is very good.