Known as Slauerhoffbrug (Slauerhoff Bridge), it is a tail bridge (kind of a bascule bridge) which can be quickly and efficiently raised by means of hydraulic mechanism to allow frequent passage of water traffic with minimum disruption to the vehicular traffic.uilt in 2000 the bridge is operated automatically almost every hour by two hydraulic cylinders which lift high in the air, a huge 15m by 15m portion of asphalt road. When closed the bridge deck merges seamlessly with the approach roads at both the ends.