Most cars have an internal structure and frame that is designed not to crumple if the car is involved in an accident. However, when you compare your standard sedan to a race car or a rally car, it's clear that most vehicles don't have such a comprehensive roll cage. Does this suggest that the roll cage actually isn't that helpful in an accident?
It does not. The fact of the matter is that roll cages absolutely can save lives. They're just used more often in racing vehicles because those vehicles are expected to crash at high speeds, so extra safety precautions are taken.
Plus, the roll cage does change the look of the interior of the car. People may not be as fond of that in a passenger car.
However, that doesn't mean you can't find passenger cars with roll cages. Take the Jeep Wrangler, for example, which has an interior roll cage that helps to hold up a soft or hard top. That top is usually made of cloth, plastic, or metal, but the cage itself is what gives it support. This is because the Wrangler was designed for off-road use, though most people just drive them on the roads like any other cars.
Experts do warn that serious injuries can still occur, even in a car with a roll cage. For one thing, passengers can be flung around inside the cage. On top of that, any items that aren't strapped down could become projectiles and strike those inside. If you've been hurt in a rollover accident in Nevada, you may be able to seek compensation for your injuries.
Source: Road and Track, "We love roll cages because they save lives," Max Prince, accessed Jan. 14, 2016