Final answer:
A mirror should allow a driver to see at least 200 feet to the rear, ensuring they have sufficient visibility for safe vehicle operation.
Step-by-step explanation:
The question relates to a regulation concerning vehicle safety equipment, specifically the requirement of mirrors to ensure the driver has a clear view of the road behind the vehicle. According to standard regulations, every motor vehicle that is so constructed or loaded as to obstruct the driver's view to the rear must be equipped with a mirror that allows the driver to see at least 200 feet to the rear. This regulation ensures that drivers have sufficient visibility to safely operate their vehicles and respond to the traffic conditions around them.
The law mentioned in the question pertains to the requirement for motor vehicles to be equipped with mirrors that allow the driver to have a clear view of the highway to the rear for a certain distance. According to the law, the mirror must reflect a view of the highway to the rear for a distance of at least 200 feet.