What length of mast arm is used in residential areas with streets less than 40 ft wide?

In residential areas with streets that are less than 40 feet wide, a 6-foot mast arm is typically used. The selection of this specific length is based on the need to adequately position lighting and safety features while minimizing light spill into residential properties. A 6-foot mast arm provides sufficient reach for mounting fixtures at an optimal height to illuminate the street effectively without causing direct glare to homeowners.

Using shorter lengths may not provide sufficient coverage for lighting in these narrower streets, potentially leading to poorly lit areas. Conversely, longer mast arms would unnecessarily extend into residential spaces, potentially affecting aesthetics and comfort for residents. Therefore, 6-foot mast arms strike a balance between effective street lighting and respect for residential environments in narrower street scenarios.