Working with "professional mechanics" who neglect or refuse to test drive and qualify their driveability repairs, causing "repaired" vehicle to break down and die with no restart in the middle of the I-15 freeway during "rush hour" VERY heavy traffic less than 8 miles into the return trip to its assigned post office.(35 miles away) CHP pushed me off of the freeway onto the shoulder, tow truck carried the vehicle and me back to the Vehicle Maintenance Facility. I'm just glad this happened to ME during a vehicle shuttle and not to another less experienced driver or the mail route carrier...