9. Waiting for a lane to completely end before merging
Roads go from three lanes to two lanes or two lanes to one lane all the time. The wrong way to handle this is to drive until the very end of the lane that's ending, and then try to merge at the last possible moment. This causes traffic jams. EDIT: This causes traffic jams because no one knows how to zipper merge, because people are jerks and hate letting people in. Here's a graphic provided by Nobody showing how to do it:
Instead, merge as soon as you are able. Sure, there that lane there that looks pretty open, but just merge when you can and you'll help everyone. You also won't look like a total tool!
Gotta disagree with this one. Where I live (Montréal, QC), people generally "zipper merge" just fine, or least every car lets one from the other lane pass in front of it. There are some jerks but not that many. I don't think it matters where people merge, when an entire lane disappears in heavy traffic it will cause a massive slowdown, that's just inevitable.
8. Not utilizing on-ramps to accelerate to highway speeds
By the time you get to the highway, you better be going as fast as the people on the highway, so you can merge into traffic immediately and safely. This means, you should be doing at least 55 on any interstate by the time you get to the end of the ramp. And for the love of all that is good, don't stop at the end of the ramp. That's so dangerous its crazy.
does drive me insane, when I'm trying to merge into highway traffic and the guy in front of me won't accelerate enough. Idiots!