"White-tailed deer can jump almost eight feet high, so effective upright fences against them should be this high. Deer may be able to jump high, but not both high and over a distance. So a fence may not be as high, perhaps six feet, but slanted outward."
Effective Deer Fences - University of Vermont
Ha ha... in the West highway fences are wooden 3-rail or barb wire... I have hit a deer on US 50 East coming down Monarch Pass, and a cow on the way from Lander, Wyo to Rock Springs, Wyo. Just gotta drive like deer are mini-vans in the city, just don’t hit them!