Testing the new Security barriers Testing the new Armed Forces barriers... From time to time someone asks what the concrete barriers are in front of controlled and secure buildings. When I tell them that the barriers will stop traffic, even trucks, from approaching the secure building I usually get a look of disbelief. I've been looking for some footage like this to prove my point. In this test, the following parameters were used. Read them and then watch the film. Truck = 65,000 lbs. Speed = 50 mph Kinetic Energy = 5.5 MILLION ft. lbs. Stopped in 24 INCHES!