While Killdeer will try and lead predators away from their nest, this one seemed intent on destruction as it stood it's ground right in front of the car.....however, I guess it's actions did cause me to stop and I ended up moving, not the Killdeer.

Killdeer facts: The Killdeer’s broken-wing act leads predators away from a nest, but doesn’t keep cows or horses from stepping on eggs. To guard against large hoofed animals, the Killdeer uses a quite different display, fluffing itself up, displaying its tail over its head, and running at the beast to attempt to make it change its path. ~ All About Birds