The Volvo C70 also comes standard with dynamic stability and traction control. The A-pillars, which frame the windshield, are made from hydroformed steel, each capable of supporting twice the car's weight. An enhanced Rollover Protection System triggers rollover bars located behind the rear headrests to protect passengers in the event of a rollover or side collision. The patented V!VA front structure of the Volvo C70 uses four different grades of steel to help direct the force of a collission away from passengers.