Why would a car smell like propane when driving down the road?

A car might smell like propane while driving due to a leak in the fuel system, particularly if it's a vehicle that runs on propane or has components that use it. Alternatively, if the car is running on gasoline, a strong odor could indicate a fuel leak or an issue with the exhaust system. It's important to address this smell promptly, as it can pose safety hazards, including fire risks. If this occurs, it's advisable to have the vehicle inspected by a professional mechanic immediately.