On 23 Nov, 12:23, wrote:
I haven't heard of own signals for busses, but I have heard over the years
that they are working on a system that would give priority to busses at
traffic signals.

It seems only to be talk, however, as I have never heard or seen anything
like that in actual practice.

The system is called "extended green" and keeps the lights from
changing in the face of an approaching bus. There's no visible
indication a set of lights has it.

U