unless you do this in the left lane or something, it probably doesn't change throughput that much or at all. A major cause of traffic jams is cascades of brakin

unless you do this in the left lane or something, it probably doesn't change throughput that much or at all. A major cause of traffic jams is cascades of braking, so leaving a safe distance allows for coasting instead of overreacting to brake lights, and prevents a traffic jam. You can get higher capacity temporarily, but eventually by reducing distance, you just cause a jam that destroys throughput.