Barry Salter wrote:
John Rowland wrote:
I was just looking at
http://www.tfl.gov.uk/corporate/proj...aces/2259.aspx

And anyone travelling from Arnos Grove along Bowes Road and wanting to
get onto the A406 Westbound will need to do a big loop via Warwick
Road and Bounds Green Road (assuming it's possible to turn right onto
Bounds Green Road from Warwick Road, that is)

It is possible.

or, worse, right down
to the Cambridge Roundabout and do a U-turn!

No, you would either cut though Palmers Road and Inverforth Road or you
could go through Seafield Road. Incidentally you have the same conundrum in
reverse now, because the left turn from Telford Road to Bowes Road is
currently banned. But the fact that Station Road and Bowes Road (nearly)
meet at their west ends means very few people have to do this anyway.

And anyone who currently turns right from Telford Road into Station
Road will need to do a similarly huge loop via Warwick Road/Brownlow
Road and Bounds Green Road.

Right turn from Browlow Rd to Bounds Green Road currently banned. I don't
see using Warwick Road as a hardship, the bigger problem is having to endure
jams in Bounds Green Road.

What is *needed* for that stretch of the A406 is a much more
substantial upgrade to bring it in line with the rest of the road,
but of course that ain't gonna happen because that would actually be
*useful*.

It doesn't need to be 50mph + flyovers like the rest of the road, but it
does need to have capacity increases at the junctions. Three lanes forward
with 50% green time at 30mph would equal the capacity of the 2 lane 50mph
underpasses between the Cambridge Roundabout and Barking, wouldn't it? And
it would require a fraction of the demolition of the underpass scheme. Is
there an online resource for working out junction capacity?

The Bounds Green Road junction could be grade separated without demolishing
a thing.