Does the Roadster have a built-in Roll Bar?
A sticker on the passenger's side door jamb specifically states that "this is an open vehicle" and that the car is "not equipped with a roll bar", so the official answer is NO. However, there have been Viper accidents where the car has indeed flipped at relatively high speeds, and the structural steel member that isn't a roll bar held up just fine. Don't, however, expect it to perform as well at 150 mph.