Does a farmer have the right to block the highway before the cattle have reached their pasture?

When cattle are on the highway, being herded to another pasture, it is wise to make sure the flow of these animals is not interrupted by traffic. Drivers have the responsibility to slow down or stop to make sure this flow is uninterrupted as well. Blocking the highway may not be needed, especially if there are ditches where cattle can be moved through instead, and they just have to cross the highway only once. However, it is best to check with state or provincial road/transportation reps to familiarize yourself with the laws regarding moving cattle.