Garmin already offers a specific product line for truckers and bus drivers, that deals with these kinds of issues - beyond vertical clearance you have issues of

Garmin already offers a specific product line for truckers and bus drivers, that deals with these kinds of issues - beyond vertical clearance you have issues of turning radius and maximum load. I've seen them being sold at major truck stops in the US. You're not suppose to use a normal consumer GPS if you're driving an oversize / multi-axle vehicle. http://sites.garmin.com/dezl/ http://sites.garmin.com/dezl/