Bat bridge

The theory is that these "bridges" will be seen by the bats' sonar as linear features sufficiently similar to the old hedgerows as to provide an adequate substitute.

[1] The English Highways Agency is performing a study of those on the Dobwalls bypass to determine if this assumption is justified.[when?

][citation needed] The first bridge to be installed in France is on the A65 motorway between junctions for Roquefort and Caloy in the Landes department.

[3][4] Two metal bridges were built in 2013 to protect the Mouse-eared Bat at Biberach an der Riss, Baden-Wuerttemberg.

[6] At A38 Dobwalls Bypass, the bridges are more elaborate and sophisticated than the earlier Welsh structures, which consisted of cables strung from poles.