Every morning I like to bike those few miles to my job and it always makes my day starting the better. Always going by the same serie of traffic lights, all aligned, they all turn green or red at the same moment. By accelerating and slowing down at some point I was able to pass them all green, but this was only for the very lucky days! Most of the time I was too slow or too fast so I had to stop at least once, sometime up the hill. It quickly became like an everyday challenge to pass all those lights without stopping.
I believe I am not alone in this situation so I thought about a cycling navigagtion device what would help you to anticipate, manage you effort and make your ride around the city more efficient.