More on the 2013 roll cage:

More on the 2013 roll cage: a look at the NASCAR roll cage for 2013, built to comply with rules changes for next year intended to improve driver safety. Int the photos on the site, the tube around the top of the cage that roughly describes the roof perimeter has been doubled up with a second tube at the front along the top of the windshield. Now there are two full tubes, generously spaced, across the leading edge of the cage in front of the driver's forehead. In the most superficial way, the roll cage in a NASCAR race car hasn't changed in decades. It's still mild steel seamless DOM tubing, 1.75-inch diameter, .090-in. wall, MIG welded into a very familiar looking assembly. But over the past dozen years, nearly every detail has been agonized, sweated over, and optimized to produce the safest possible structure.