You can ride as fast as you like.
Unlike a car, where you are pressured to keep up with the car in front, and pressured to keep to the speed limit, so as not to create congestion a bike is free to go at any speed the cyclist wishes. There's no queue when riding a bike, so you're never stuck behind another cyclist. And conversly, any other traffic can pass you with ease, and thus no pressure to keep up. Cool eh?