River lock in Antwerp

Huge lock in Antwerp! When all the boats entered there were 3 like this one in the picture and another 5 smaller boats behind. As the road travels over the lock gates they devised a unique system of making sure the traffic flowed at all times. The entrance of the lock gates lifted to allow the boats in and the traffic was diverted to the exit gates. Then when the boats needed to leave the lock the road pulled back and the traffic was again diverted to the gate at the entrance.

Pulling back the road.