How high should a light be located above the surface of a road that is less than 40 ft wide?

For a road that is less than 40 feet wide, it is generally recommended that a light be located between 0 to 6 feet above the road surface. This height provides adequate illumination while minimizing glare and ensuring that the light effectively covers the intended area without exceeding necessary height limits that can potentially create safety issues.

Choosing this height allows for effective visibility for both vehicles and pedestrians, who may be using the road. If the light were to be placed too high, such as in the ranges above 6 feet, it could lead to less effective light distribution on the road surface and create shadows that could hinder visibility, especially at night or in low-light situations. Therefore, positioning the light within this 0 to 6 foot range strikes the right balance for safety and functionality on narrower roads.