DOT & State Inspections We are a group of Certified Mechanics with more than 25 years of combined experience in Chassis and Trailer repairing work, Road Service and Preventive Maintenance (BIT and FHWA Inspections). We are equipped with all the vehicles and tools necessary to do all kinds of trailer and chassis repairs. Our vehicles also satisfied with the safety standards of BNSF and UP because of that we had been approved for access into their facilities.