Basil Jet wrote:
On 19/06/2019 21:07, Recliner wrote:

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.


I don't know what the limit is on how close junctions are allowed to be
on motorways, but that might put the T5 junction and the M4 junction too
close together during the interim, leading to dangerous weaving.


Why would they be any closer than they are now? In any case, there are
much closer motorway junctions elsewhere.