Road users can only use the Passage du Gois twice a day for just a few hours, since the 4.5-km highway is submerged as the tide rises. The road is not only unique but extremely dangerous too. Twice every day, when the high tide rises, the 2.58-mile long road disappears 13 ft under water.
So people can use this road only two times a day for a few hours (special panels on both sides of the road show when it’s safe to use it). Though sometimes people still get caught between the tides, but luckily there are elevated rescue towers for people to climb and wait to be rescued.