I've been looking forward to seeing this pictogram painted on the bike lanes.
Copenhagen has, on certain stretches of bike lanes featuring heavy traffic (15,000 + bikes per day), started coordinating the traffic lights to give cyclists a 'green wave' all the way along the route.
This means that if you ride 20 km per hour you'll hit green lights the whole way.
Some people have bike speedometers, but most can adjust their speed using their experience, without electronic interferance, and enjoy an uninterupted ride to and from work.
Most of the stretches featuring the Green Wave have 15,000 - 30,000 bikes per day.