New Garmin
I have the streetpilot 530C and have set the Bus option. It also had a truck mode, but the manual does not detail the differences. I have no idea whether it watches out for height, but in theory it is supposed to keep you off of dead end streets and narrow side streets.
I was in the van this weekend and Garmin got so confused trying to take me in the backroads of Ottumwa, Ia., I would have never made it out of there in the coach. I switched the bus mode for the return trip the following day and it seemed to get confused again. This time, I knew the correct route and just ignored it.
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