I'm greatly in favor of a slower-moving but more efficient automotive network. How many human inconveniences are caused by what boils down to impatience? See: gridlock, people entering intersections they cannot leave, and jamitons.

(IMHO) jamitons would dissolve if people would leave a flexible buffer between them and the car in front of them and focusing on minimizing braking, rather than driving up to their bumper, brake, wait for moving, accelerate, brake, repeat. The lag due to reaction time and ac/deceleration exacerbates the "viscosity" of traffic flow. If most drivers focused on "staying fluid" rather than hurry-up-and-wait, traffic ought to improve. Like fluidized beds.

https://math.mit.edu/projects/traffic/