RIVERTON, Wyo. (AP) — Research continues in two Wyoming counties to examine the efficacy of roadside reflectors that warn wildlife of approaching vehicles.

The three-year study is being done by the Wyoming Department of Transportation and Teton Science Schools.

Upcoming studies will focus on U.S. Highway 16/20 between Basin and Greybull in Big Horn County, and U.S. Highway 26 west of Riverton in Fremont County. Big Horn, Hot Springs and Fremont counties have some of the highest rates of road kill per mile in Wyoming.

The Riverton Ranger reports the reflectors work by scattering light from oncoming headlights. The light causes deer and other animals to freeze in their tracks.