Evaluation of Performance of Solar Powered Flashing Beacons at Room Temperature Conditions

摘要

The use of solar powered flashing beacons on the state highway system is increasing. The flashing beacons may be used at rural stop controlled intersections, roadways with restricted geometry, in advance of work zones, and other situations that require more attention from drivers than normal driving conditions. The flashing beacons feasibility, reliability, and performance have improved with the advancement in technology including the use of LED modules. However, how long the beacons can function depends on the battery type, operating environment, and the flashing pattern used. Environmental conditions (temperature, cloud, etc.) could affect the battery charge level. The flashing pattern and visibility of the beacon may change as the battery charge level decreases. The beacons could be in locations with a lot or with a limited amount of sunshine. As a result, it is critical to know how long the beacon can flash in Manual on Uniform Traffic Control Devices (MUTCD) pattern if for some reason they are not exposed to sunlight for a short time period.