passing an intersections with traffic lights should incur a delay.

but - in copenhagen (and probably other places too) we have green waves for bicycles: traffic signals are adjust to the speed of bikes. if you go at a typical bike cruising speed, you'll get green lights all the way. in the morning the green waves occurs towards the city; in the afternoon it's away from the city. optimally osrm would take this into account; it's these kind of things that we would like a bike route planner for copenhagen to handle.