[villagetinker]

There are several different traffic light timing programs in use in the area. I have seen:
Left turn arrow turn green when the straight thru green lights go on.

Left turn arrow turn green when the OPPOSING traffic left arrow turns green and thru lanes are red

Left turn arrow turns green AFTER the thru lanes turned green, near the end of the cycle

This does tend to be confusing, especially where the traffic signals are adaptive, and change depending on traffic flow.

NOW as for the proposed roundabout on 301, there have been several very interesting comments and observations. My view has softened somewhat, but I still think there will be a continuing problem with OUT OF THE AREA drivers encountering the roundabout and doing something stupid. Please think about what happens this time each year when the snowbirds return.
Also, while I do agree that the accidents at the traffic lights appear to be more numerous, I have had more close calls on roundabouts then at traffic lights.

My plan will be to avoid 301, until the dust settles, then try it during NON rush hour times and see how it and the other drivers work.