Green Lights on a Bike
Living in CA, most cities tend to be bike sensitive and install special triggers to activate green lights. However, there are still plenty of signals that have not been retrofit with the bike sensitive sensors. Generally, I end up running these lights or hitting the button for peds. (This is much harder than you would think since you generally have to get onto the sidewalk without crashing or getting hit by a car. No small feat while you are clipped into pedals.) Anyway, this product looks interesting. It is not something I would use for a long ride on the weekend, but for a commute bike, it might be worth it.