The tunnels allow amphibians and reptiles to cross roads without the risk of being crushed by a vehicle.
Some governments in the United States and Europe build herp tunnels which are large enough to accommodate reptiles like turtles.
The Harris Center for Conservation Education organizes a salamander Crossing Brigade made up of volunteers each year.
[12] In Canada the city of Guelph, Ontario, has built tunnels to help reptiles cross roads.
[13] In Britain tunnels were built under a roadway to help adder snakes cross the road.
The city Planning Commission required an 18 in (460 mm) wooden boardwalk above the waterline inside of two 8 ft (2.4 m) wide underground culverts.