Re:New food truck build
Did you lower the baggage compartment anyor was that the existing clearance? ... I think this makes the bus fall into the 'long wheel base - low clearance' hazard vehicle (hump hangup). Lowboy long wheel base trailers may be as low as 6"; some 'city' bus might be as low as 8". ...Most long wheel base 'road' vehicles have 12 to 14 inched ground clearance.
Your problem areas would be at railroad type hump crossings and driveway (parking lot) entrance/exists (very common). ... Most humps are designed for short wheel base (passenger car & pickup truck) vehicles with lead-up ramps/slope to limit the clearance to 3" or less. But with long wheel base vehicle the entire hump (or portion) between the wheels may exceed the vehicle clearance (ie: hump hangup). Most road designers don't have the proper references for correct design of low clearance vehicles, then fixing the hangup hazard is an 'after the fact' situation.