Floating bridges are in many ways an anomaly. One particularly exciting example was built by Waagner-Biro in Dubai. It is the first of its kind in the emirate and carries six lanes over the Dubai Creek. This pontoon bridge has a width of 2 x 22m and a total length of 365m. The challenge lies in balancing the shifts in height caused by waves and differing traffic loads.
An independent bridge structure was built for each of the two traffic directions. Between the two 115m long concrete pontoons, is a hydraulically driven swing gate made of steel, which provides an unobstructed shipping lane. The entire construction was completed in a record time of just 23 days.
https://www.youtube.com/watch?v=GJ7KTweCfpc