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Safe Bat Paths

Fumbling in the dark - effectiveness of bat mitigation measures on roads

Roads may have a negative impact on bats. Collisions between bats and the traffic may increase mortality rates, and roads may act as barriers for commuting bats and reduce the habitat suitability through noise and light pollution. All bat species are at risk at roads, but the impact by roads can be particularly severe on the population status of species that typically commutes and forage at low altitudes.

A wide range of measures has been employed to mitigate and compensate for the potentially negative effects of roads on bat populations (e.g. fauna bridges, underpasses, hop-overs, gantries and other bat passes, adapted road bridges and technical structures, bat boxes). However, only a few studies have adequately tested the effectiveness of the different types of mitigation and compensation measures.

This project aims to elucidate the status and effectiveness of bat mitigation measures on roads.

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The project is funded by the Conference of European Directors of Roads (CEDR)