Instead of requiring safety features no one would willingly pay for on their own vehicles, we should remove the driver's air bag and replace it with a 6" spike pointed at the driver's chest. Guaranteeing serious trauma if they crash head on, and constantly reminding the driver of the gaurentee. All the sudden, traffic improves because people stop tailgating and start leaving 4 second following distance in clear conditions which allows proper merging. Proper merging is how engineers design roads and model traffic flow. And looking down at your phone while driving, same penalties as DWI.