If motor vehicle operators--I didn't use the term "drivers" because most people don't drive but only steer--would reduce their speed, either voluntarily or by enforcement, from the posted limit of 65 or 70 mph, in congested areas during rush hour--to about 35 mph, then all of the accidents that cause traffic to stop moving altogether would also be reduced and the average speed through those areas, during those times, would be closer to 30 mph rather than 2 mph. Not texting or playing with one's GPS and learning what "Merge" and "Yield" mean could increase that to perhaps 32 mph. Even with our poorly designed Entry/Exit ramps.
I used to think that OKC had The Worst Steerers. That was before I encountered Dallas and/or Minneapolis/St.Paul.
Did I forget Kansas City? sorry. L.A.? . . . Fuggedaboudit.