John Rowland wrote:

Steve Firth wrote:
John Rowland wrote:

Steve Firth wrote:
Doug wrote:

Road congestion is primarily caused by too many cars and if left to
its own devices would be self-limiting.

The experience within Birmingham, when the entire traffic light
system failed, shows that if it were truly lef to its own devices
that the traffic would flow better than it does at present.

Where "traffic" doesn't include pedestrians or cyclists...

And?

You were implying traffic lights serve no useful purpose...

No I wasn't. I was stating that without traffic lights the traffic flows
more smoothly than with. If you wish to infer from that that I am saying
that they perform no useful function then that is your inference, not my
implication.

if they enable pedestrians to avoid getting run over, they serve a
purpose, even if the motor vehicles move better without them.

You seem to be confused about the difference between traffic lights and
pedestrian crossings.