Basil Jet wrote:

At the crossroads of Exhibition Road and Cromwell Road SW7, traffic
approaching from three directions is now banned from turning left or
right. This is signified by the green light being a forward arrow. At
other junctions where both turns are banned you would see a vertical
white arrow on a blue background beneath the three traffic lights,
but they have not done that here. The result is that if you arrive at
the junction when the light is red, you may not know that the turns
are banned until the light turns green, and since most people start
moving when the amber comes on, that seems a bit late to me.

There are currently large banned left and right turn signs on metal
easels, but these are obviously temporary and seem to be an admission
that TPTB know that the lack of the permanent signs is confusing. I
am doubtful that you could be prosecuted for turning when the
temporary signs are gone and the green arrow light is all that
remains. The only other indication that the turns might be banned is
that both lanes approaching the junction have a forward arrow painted
on them, but I know that these have no legal force and can also be
found at junctions where the right turn is only banned part time. So,
is the new signage legal? it seems like a backward step to me.

It might be worth bringing this to the attention of the local council
highways dept, see what they say.

--
Paul - xxx
"You know, all I wanna do is race .. and all I wanna do is win"
Mark Cavendish, World Champion 2011.