In message , at 13:14:59 on Mon, 9 Jul
2018, John Williamson remarked:
The average speed in London is *not* 8 mph. It's 8.something in
*central* London, and the average over *all* of London, including the
centre, is 19.something.

According to TfL, it was 7.8mph in central London, and 17.4 everywhere
else in 2017

Given the rollout of whole boroughs limited to 20mph I find the latter
figure hard to believe.

Expect major problems over the next year or three as various bits of
the Victoria embankment get closed in one or both directions while they
update the sewer under it.

--
Roland Perry