What is the maximum cone spacing when used at night?

The maximum cone spacing when used at night is 40 feet. This standard is established to enhance visibility and ensure that drivers can clearly identify the boundaries of work zones after dark. The visual impact of cones can diminish in low-light conditions, which is why closer spacing is typically recommended at night compared to during the day, where visibility may be better.

With a 40-foot spacing, the cones create a sufficient line of sight and awareness for drivers, helping to reduce confusion about the lane changes or restrictions imposed by construction or maintenance activities. This spacing assists in providing a safer environment for both motorists and workers by ensuring that the delineation of traffic patterns remains prominent.

Understanding this standard is crucial for maintaining safety in work zones, especially at night when the risk of accidents can increase due to reduced visibility. Properly implemented cone spacing is a critical component of effective traffic control and safety practices.