Except the primary causes of accidents is differences in speed and constant merging between lanes . What the bully who is tailgating is doing is forcing multiple cars to adapt to the way he wants to drive more dangerous and to tell others he wants to do that he is putting everyone at risk by tailgating . At the end of the day , if he just left a little earlier and took a chill pill every now and then he might realize that speeding is really not that beneficial . 1020 mph over the limit only cuts your commute time down by a few minutes . The only time you will see a big improvement is on long road trips . On night nightly commute home I see these ass hats weave in and out of traffic to go a little faster . Then we hit the light to turn into my neighborhood 30 minutes later and guess who is in front of me , the exact same guy that was going so much faster .