If you could keep them all moving, it would be more successful than the reality:

Vehicle breakdowns
Vehicles running out of gas
Road rage
Sheer panic
Poor driving habits
Drivers distracted by cell phone and laptop use
Drivers distracted by spilling coffee
Drivers trying to swat kids in back seat
Drivers weaving through traffic to get further ahead
Drivers changing their mind, trying to go in opposite direction
And the ever-present road repairs and changes, with the barriers, cones, barrels, signs and equipment.

Considering what a city looks like every morning and evening, I wouldn't expect much.

Sue