On Apr 18, 11:35*am, Jethro wrote:

Mind you, this falls into my "if it *really* mattered" test ...
similar to being able to control *all* traffic signals (INCLUDING
pedestrian lights). I'm sure if some enlightened local authority did
this, they could improve the efficiency of the road network (i.e.
reduce the need for new roads) by a considerable amount.

Many areas already do have centrally controlled traffic signals.