Filed under: Videos, Volvo, Safety, Technology, Truck, Commercial Vehicles Volvo Trucks developed the Stretch Brake system to keep its tractor-trailers from jackknifing by pulsating the rear brakes to keep it all under control. Continue reading Watch Volvo show how not to jackknife a semi Watch Volvo show how not to jackknife a semi originally appeared on Autoblog on Tue, 16 Feb 2016 13:18:00 EST. Please see our terms for use of feeds. Permalink | Email this | Comments Continue reading...