Rain sensors were recently installed at an intersection in Rotterdam which will give priority to cyclists when it rains, by turning the traffic lights green for them.
As soon as the sensors become wet, they start to prioritise cyclists and decrease the average waiting time for cyclists by 40 seconds.
The sensors are part of a thirty-point action plan which the city is introducing to encourage cycling. And the move seems to be working as in the past year, bike traffic has increased by 10%.
If the sensor proves to be successful, then the city will be looking at installing more.