I have thought about this one for a long time. There are some obvious issues people would raise, but overall I like it.
No commercial traffic is allowed between 6am and 7pm with the following exceptions: public transportation, including intra and interstate buses; small package delivery vehicles (such as Fed Ex and UPS); and moving vehicles picking up or delivering personal goods (vehicles moving businesses would be restricted).
This restriction would apply in both urban and rural areas and include construction vehicles.
The result would be a significant reduction in traffic. It would also end commercial truckers driving more than 11 hours per day (in itself a violation). It would probably, over time, force much trucking onto rail for longer than two day trips.
It would also put somewhere between 15 and 25% of the labor force onto 2nd and 3rd shifts.