Every vehicle must have a mirror that allows the driver to see ____________ to the rear.

The requirement for vehicles to have a mirror that allows the driver to see 200 feet to the rear is grounded in safety regulations aimed at ensuring visibility while driving. This distance is significant because it enables the driver to have a clear view of what's behind them, which is crucial for safe maneuvers like changing lanes, backing up, or merging. Visibility at this distance helps drivers avoid collisions and enhances overall road safety. It is established that 200 feet provides a sufficient margin for a driver to assess traffic conditions or hazards effectively, making it a standard requirement in many jurisdictions.