"… at about 240 mph the joints in the concrete road surface are felt like blows, setting up a corresponding resonance through the car, but this disappears at a greater speed. Passing under bridges the driver receives a terrific blow to the chest, because the car is pushing air aside, which is trapped by the bridge. When you go under a bridge, for a split second the engine noise completely disappears and then returns like a thunderclap when you are through"

"… at about 240 mph the joints in the concrete road surface are felt like blows, setting up a corresponding resonance through the car, but this disappears at a greater speed. Passing under bridges the driver receives a terrific blow to the chest, because the car is pushing air aside, which is trapped by the bridge. When you go under a bridge, for a split second the engine noise completely disappears and then returns like a thunderclap when you are through"