As part of the effort to implement AB1581, which requires new traffic signals to detect bikes, the Caltrans subcommittee is also looking at signal timing. But that will take a long while before that gets ironed out and filters down to the cities. Personally I haven't needed to request signal timing changes (I guess I'm just used to sprinting from a stop!
), but probably the best thing to do would be to call the city Public Works department. You should request that the green time should be longer, not the yellow.