You might be surprised about that. To use a blunted instrument as a descriptor, you cause an accident and it results in complete stoppage of traffic. However,

You might be surprised about that. To use a blunted instrument as a descriptor, you cause an accident and it results in complete stoppage of traffic. However, much smaller things can actually impact the flow of traffic in a significant manner. Brake late and hard and you can watch the ripple effect for many cars behind you. It can actually cause a ripple that goes back for miles and has effects lasting for much longer than you might think - on the order of minutes to as long as a half hour in extreme situations. All that from just braking late and hard under the right circumstances... If you want to improve the flow of traffic, as a single individual, leave space between you and the car in front of you, allow people to merge, and strive to maintain a constant speed. You may actually reach your destination faster, though it isn't intuitive. Edited to add: I modeled traffic. That is what my business did. I started with vehicular traffic and would later expand to model pedestrian traffic. Traffic is a fascinating subject that is chaotic in nature.