What is the minimum legibility distance for Type A arrow displays?

The minimum legibility distance for Type A arrow displays is established to ensure that drivers have sufficient time to recognize and react to the traffic control signals. A distance of 1/2 mile allows vehicles traveling at typical speeds to perceive the arrow and understand the intended direction of movement well in advance. This distance is particularly crucial for maintaining safe traffic flow, especially in work zones where unexpected changes in traffic patterns can occur.

Type A arrow displays are designed for use in situations where clarity is vital, such as guiding vehicles safely through or around work zones, and this distance reflects standard practices to minimize confusion and enhance safety on the road.