AB1581, which became law in 2008, requires all new or replaced traffic signals to respond to the presence of bicyclists. In addition, a requirement to develop signal timing guidance was also a part of AB1581. Both are incorporated in Policy Directive 09-06 from Caltrans.
The video clip below is of a cyclist making a left turn from a residential collector onto a six lane arterial. Although it’s a bit difficult to see in the video due to the wide angle lens, the cyclist’s position when the light turns green for traffic on the arterial is in the middle of the number two lane. The cyclist reaches the bike lane on the other side at about 12 seconds after receiving the green.