Home»All Photographs»Highways, wildlife, and mitigation measures»Wildlife warning signs

Wildlife warning signs are very common. There are standard wildlife warning signs, seasonal warning signs and warning signs that have been somehow enhanced. Standard signs typically show a silhouette of the species that may be on or near the road. However, these types of warning signs may not be effective in reducing wildlife-vehicle collisions. Seasonal warning signs can be used when animals cross roads in relatively high numbers at particular times of year. Mule deer, elk, and pronghorn for example have seasonal migration patterns in some areas. Signs that are only up during those high risk periods are more time specific than standard warning signs and have shown some reduction in wildlife-vehicle collisions. Enhanced wildlife warning signs may include larger signs, variable message signs with dynamic displays, graphic images, or symbols. They may also show a tally of the number of wildlife-vehicle collisions in the area, or have brightly colored flags or flashing amber lights that are attached to the warning signs.

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