Covering the brake can cut reaction time by how much?

Covering the brake can significantly reduce reaction time, potentially by up to 30% or more. This practice allows a driver to be more prepared to stop quickly in response to sudden changes in traffic conditions. By keeping a foot poised over the brake pedal, drivers can react faster than if they had to first move their foot from the accelerator. Overall, it enhances safety by enabling quicker responses to emergencies.