Warning signs mitigate deer–vehicle collisions in an urban area
Published source details
Found R. & Boyce M.S. (2011) Warning signs mitigate deer–vehicle collisions in an urban area. Wildlife Society Bulletin, 35, 291-295.
Published source details Found R. & Boyce M.S. (2011) Warning signs mitigate deer–vehicle collisions in an urban area. Wildlife Society Bulletin, 35, 291-295.
This study is summarised as evidence for the following.
Install signage to warn motorists about wildlife presenceAction Link
Install signage to warn motorists about wildlife presence
A replicated, randomized, controlled, before-and-after study in 2005–2008 at 26 urban sites around a city in Alberta, Canada (Found & Boyce 2011) found that warning signs reduced the number of collisions between vehicles and white-tailed deer Odocoileus virginianus. At warning sign locations, there were fewer deer-vehicle collisions after sign installation (0.4 deer-vehicle collisions/location/year) than before (1.7 deer-vehicle collisions/location/year). Concurrently, at locations without warning signs, there was no significant difference in deer-vehicle collision rates after (1.0 deer-vehicle collisions/location/year) compared to before signs were installed (1.7 deer-vehicle collisions/location/year). Twenty-six road locations with high incidence of deer-vehicle collisions were selected. Pairs of reflective deer warning signs (90 × 90 cm, diamond shape) were mounted on 3-m-high posts, 1,600 m apart, facing opposite directions, at 13 locations (randomly selected) in June 2008. The other 13 locations had no signs installed. Deer carcasses (mostly white-tailed deer but possibly some mule deer Odocoileus hemionus) were monitored within an 800-m radius of each location from June to December in 2005–2007 (before sign installation) and in June–December 2008 (after sign installation).
(Summarised by: Ricardo Rocha)