It is illegal to drive a herd of livestock across a state highway without a warning flag.

The Law

If a rancher needs to move a herd of cattle or sheep across a busy state highway, they are legally required to deploy flaggers with red warning flags to alert oncoming traffic. This is a very practical safety measure in a state where agriculture and modern highways frequently intersect. Hitting a cow at 70 miles per hour is a disaster this law aims to prevent.