Where should a straight edge be performed on the road?

The straight edge should be performed in the outside wheel path because this area is critical for assessing proper surface smoothness and drainage of the roadway. The outside wheel path typically experiences more significant wear and tear due to the weight of vehicles and the pattern of vehicle usage. By using a straight edge in this location, it allows for a thorough evaluation of the pavement's profile, ensuring it conforms to specifications required for performance and safety.

Conducting the straight edge assessment in this zone helps identify any irregularities that might affect vehicle operation or lead to premature pavement failure. It also promotes effective water drainage away from the lane, which is essential for maintaining road integrity and driver safety.