The California Department of Fish and Wildlife and CalTrans are working on six projects around the state to reduce the number of collisions involving vehicles and wild animals.
A 2008 Federal Highway Administration study says there are 300,000 reported collisions between vehicles and animals each year.
Dana Michaels with the California Department of Fish and Wildlife says animals cross roads depending on the location and time of year.
"Later on in the fall is rutting season for deer," says Michaels. "At that time, males just aren't paying any attention to anything except females. They just run wherever they are inclined to go. There seems to be an uptick in October and November."
In Sierra County, Cal Trans has proposed two highway under-crossings and directional fencing for deer along Highway 89. Undercrossings have also been designed for sections of Highway 246 in Santa Barbara to help migrating tiger salamanders.
Monday marks the beginning of Watch Out For Wildlife Week.