Which of the following is NOT a characteristic of Type A low intensity warning beacons?

Type A low intensity warning beacons are specifically designed to provide visibility and alert drivers in low-light or nighttime conditions. They are typically mounted on various structures, including channelization devices, to increase their visibility and effectiveness in work zones and other hazardous situations. The main characteristics of these beacons include their brightness, which allows them to be effective during nighttime, as well as their visibility range, typically being visible at distances up to 3,000 feet.

The choice of being mounted on posts is not applicable to Type A beacons, as they are primarily attached to other devices such as channelization devices, which help guide traffic and indicate a particular area of concern. This distinction is significant because it underscores the intended use and placement of Type A beacons in enhancing safety in work zones. Thus, the correct response identifies that being mounted on posts is not characteristic of Type A low intensity warning beacons.