I'll tell it like the DOT officer told me. "The law is 53', Not 53'8".
I do it anyway,.. if more than 12" I put flags out back.
The pipe in my pic had a 3' over hang. If you look at the full size image you can see the flags out back. I ran that from Salt Lake to Austin. Went through 2 or 3 open scales, held my breath and got green light each time. So sometimes you get lucky,. but its like anything else we do. If you know your wrong,.. dont get upset when they call you out on it.