Bad grid rigibody3D collision

I have map of solid block(in 3D with x and z axis) and every block have box collider and I have the vehicle with Rigibody3D, but while I am adding force to the vehicle it get rotating(strikes the non-existent edges that overlap) by these solid blocks but that surface should be flat(smooth) and so a ride ,any solutions for this...
Box Collider is on each part(parent object have rigibody)