摘要: |
The purpose of the augmented Speed Enforcement (aSE) project was to detect and warn speeding vehicles in a work zone and provide warnings to work zone workers. The system developed by Montana State University consists of 28 orange traffic drums (called smart drums or sDrums) that were positioned adjacent to the orange cones marking the work zone lane closure. When the system detects a speeding vehicle approaching, it synchronously flashes the orange lights on top of the drums, warning the driver to slow down and the workers of a speeding vehicle. If the vehicle speed is above a set trigger speed, the system activates a pager system that warns the workers of the speeding vehicle. The sDrum system used a Long Range Systems pager system which is the focus of this report. Basic range measurements were performed for the transmitter and a repeater since there is no published range. The transmitters range was measured over 600 feet and the repeater range was approximately the same. The transmitter to repeater range measured over 1700 feet. Transmitter and repeater power consumption were also measured. This report contains the full results of the pager system tests performed. |