Cycle campaigning

There's another tunnel scheme being promoted here - put the A4 underground:
https://www.lbhf.gov.uk/Directory/News/Hammersmith_flyunder_options_to_be_revealed.asp#4

The A4 and Hammersmith gyratory blight the surrounding area so there is a certain attraction to sticking them underground and out of sight... but this would mean spending billions on car journeys into central London just so they can crawl along at a few mph.

LBH&F don't give a shit about cycling but I'll bet the developers are crawling all over them about this scheme given the potential to release land for development.

I can't see it happening - the Chiswick NIMBYs will be out in force against the big fuck-off Crossrail-like construction that would be needed in W4.

my impression was they were claiming they could fund it by developing the land freed up by knocking down the flyover. is that wrong?