A GPS setup for HAZMAT loads will not take you off the main road (Interstate) except near cities; then you usually follow the beltway around them. Maybe this guy just had a regular car GPS. Not really enough info to go on. But that is what common sense and a little intelligence is for; to keep you from making dumba** mistakes like this. (I know, we haul HAZMAT 95% of the time.)
Or this guy know he was overweight or wouldn’t pass a safety check and decided to go around. It would be interesting to see if he passed through any other checks on his drive up...
You’d think for a possible 12 grand infraction, he’d would have the GPS for trucks!