Motor carrier size and weight limitations; with federal law.

Amends several size and weight provisions to comply with the federal Fixing America's Surface Transportation Act of 2015 (the FAST Act). The bill (i) allows automobile and watercraft carriers to backhaul general cargo; (ii) permits the commercial delivery of towaway trailers within limits prescribed by the FAST Act; (iii) increases the weight limits of certain emergency vehicles, natural gas vehicles, and emergency towing vehicles as required by the FAST Act; (iv) increases the weight at which a vehicle must be inspected at a permanent weighing station; (v) makes overweight permits available for tank vehicles hauling fluid milk; and (vi) permits contractors of a Medicaid Managed Care Organization to obtain a certificate of fitness as a nonemergency medical transportation carrier.