In your area, is it custom to pull your car to the side of the road, as you would for an emergency vehicle, for a funeral procession?

I live in Northern Illinois, a somewhat rural area, and it is not the custom here. My uncle passed in Clovis, NM and every single car from the opposite direction and in the direction of the auto procession, pull to the curb as we passed. It was really touching and symbolic. He was a veteran of WWII and the Hearse had a somewhat large American flag on the hood (used for veteran funerals) Perhaps it was for the veteran, or a Western custom. Comments.