I don't have a problem with either of these things.
The 80 mile an hour thing is really just formalising what already happens on the motorways.
( Kroney, Fri 30 Sep 2011, 14:43, 2 replies, latest was 14 years ago)

I've just realised your new name sounds like a Wetherspoon's

( scarpe We Stole Bikes, Fri 30 Sep 2011, 14:45, Reply)

I'd probably be in favour of removing the motorway speed limit altogether
and wider use of rolling speed limits as already seen on the M25 for periods of heavy traffic, works or accidents.
( Kroney, Fri 30 Sep 2011, 14:46, Reply)

Simple flow dynamics shows us that if a conduit is narrowed
to maintain the flow rate then the speed of the material flowing through needs to be increased to maintain flow rate.

so when a lane is closed the speed limit showed be raised, fact!
( Naked Ape call me Caitlyn, Fri 30 Sep 2011, 14:48, Reply)

You have to slow the traffic down so that everyone can have a good look, though.

( Kroney, Fri 30 Sep 2011, 15:24, Reply)

unfortunately it would get a bit turbulent

( Vipros. clever got me this far, then tricky got me in, Fri 30 Sep 2011, 18:18, Reply)