Cadillac One

It may not be stylish, but the new presidential limo, set to debut on inauguration day, should be the most impenetrable vehicle on the road. Dubbed "The Beast" for its tank-like construction, the custom-built Cadillac will feature tougher material than its predecessors, CNN reports. The vehicle's doors are likely as heavy as a 757's and can lock like a bank vault if necessary. The interior will be completely sound-proof and should help the president-elect feel like he's in a cocoon. While a Cadillac may seem like a gas-guzzler, the car's expected diesel engine should help Obama maintain his green bona fides.