Originally Posted by
silver_ghost
Sometimes I dream about discontinuous speed bumps with gaps in the middle big enough to let bikes through but that cars must slow down for. They'd be great for enforcing school zone speed limits etc.
Research has shown the speed bumps are ineffective at controlling speed, and result in increased fuel burn. Why? Because people slow down for the bump and then accelerate hard, often acellerating enough between bumps to completely negate the slow-down effect.