The opposite effects of roads (barriers) and road verges (corridors) have been not studied simultaneously and it is therefore unknown what the overall effect of road infrastructure is on the populations of pollinating insects. We used an experimental approach that allowed us to simulate pollen transfer between flowers placed in road verges with different flower densities to track the movement of flower-visiting insects in road environments.

Demand-controlled LED street lights are only fully illuminated when there is traffic and dimmed in the absence of traffic. In our study, dimming reduced the light on average by 35%. Effects of dimmed light on the abundances of nocturnal insects and bats were generally beneficial as fewer insects went into traps and fewer bat signals were recorded when the lights were dimmed.

We investigated the spatial changes in grasshopper and cricket assemblages in relation to a motorway passing through unmanaged grassland habitat in Croatia. For the first time, our results show that motorways affect grasshoppers and crickets at this level, with both detrimental and beneficial effects on their diversity, depending on the distance from the road.

There are more than 1,400 species of bats worldwide and they play critically important roles in ecosystem health. We conducted an international systematic review and found that many species of bats are significantly impacted by barrier effects due to the presence of roads, by mortality due to collision with vehicles, and by habitat loss and decreased activity due to habitat alteration.