I've seen three different cab marker set ups. I knew they were tied to the width but also figured on changing standards thru the years. 2 markers one each side, 3 markers clustered in the middle and 5 markers 2 each side plus the 3 clustered in the middle. The ones you see going down the road these days with 10 or 12 across the cab can actually be ticketed as some are to close together though there is no doubt visablity is enhanced.
