<human>: Can you provide a brief overview of the text?

So I'm on my way home from work, getting on the on-ramp to the parkway. I'm the third car in line, with about 10 more cars behind me. The car at the very front is going about 5 mph trying to merge onto the parkway...but there are no other cars in sight. In other words, he's driving about 30 miles below the speed limit for no good reason. The car in front of me, a green (Honda, maybe?) understandably honks. Not obnoxiously, but enough to let the guy know to get a move on. The first car, a Volvo who I'll refer to as Bitchdick McGee, finally speeds up, heading straight into the right lane. Greeny speeds up and tries to pass on the left. BM VIOLENTLY SWERVES into the left lane to prevent him from passing. Maybe it was an honest mistake, but probably not. Ok. Greeny speeds up and tries to pass him on the right. BM again, violently swerves into the right lane to prevent the pass. Greeny moves left again, then right, but BM matches him swerve for swerve, driving right down the middle at one point, defending each lane like a basketball player protects his basket. This back and forth went on for about 15 seconds while I sat there astonished and unconsciously speeding to keep up with them. Eventually Greeny settled into the left lane behind BM, obviously not willing to mess with this crazy fucking asshole any longer. Unsure of what else to do, I snapped a picture of his car and license plate.  **reddit, my question to you is, is there anything that can be done to get this obviously unstable driver off the road?** I know I've often seen things while driving and said to myself, "If there was an efficient way to do it, I'd totally report that guy." Well, reddit? What do you got? **Is there anything that can be done about this, besides complaining about it on reddit?**
I'm headed to dinner now, but I'd appreciate any comments you guys leave!
<bot>: Asshole driver was an asshole. I'd like to report him, but don't know how/where to begin.