One avoidable obstruction to road traffic is stalling the engine. This is especially a beginner's mistake, which in the worst case can result in a rear-end collision. However, this can be easily remedied by appropriate practice on secluded roads. In addition, according to road traffic regulations, every vehicle must be refuelled in good time to prevent stalling. Finally, it is also part of your duty as a motorist to drive at an appropriate speed, i.e. never drive so slowly for no reason that you could obstruct traffic and provoke an accident.