WORK ZONE DIGITAL SPEED LIMIT (DSL)
Ver-Mac worked closely with Ohio DOT to develop a Work Zone Digital Speed Limit (DSL) trailer to reduce speeds approaching a work zone when workers are present. The DSL features a two digit, 18-inch-high white LED display and two 12-inch flashing beacons. During non-construction hours and when workers are not present, the DSL will display the posted speed limit. During construction hours and when workers are present, the DSL will display the work zone speed limit and activate the two 12-inch beacons.
WORK ZONE DSL OBJECTIVES: • Improve worker & motorist safety • Increase motorist awareness of an upcoming work zone • Decrease speeds in work zones • Reduce work zone rear-end collisions
WORK ZONE DSL APPLICATIONS • Any multi-lane highway or interstate work zone without robust barrier between motoring public and workers • Asphalt resurfacing projects • Any applications where a lane is taken intermittingly for construction
WORK ZONE DSL FEATURES • Real-time display of work zone speed limit • Two 12 in. highly visible flashing beacons • Highly visible 18 in. white LED numeric display • Autonomous device (solar & battery powered)
• Local or remote activation/deactivation of variable speed limits • Ability to create a pre-defined schedule using a laptop or smartphone • JamLogic Software provides valuable information such as history of date, time, GPS location, speed and beacon activation. WORK ZONE DSL BENEFITS: • IMPROVED SAFETY - Smoother transition to reduce speed differential – less shock waves and work zone intrusions • REDUCED SPEEDS - Tests have shown that motorists see the work zone variable speed limit sign and slow down. (up to 7 mph avg. speed reduction) • ENHANCED VISIBILITY - Two-digit display & two flashing beacons provide positive behavior from motoring public • INCREASED COMPLIANCE - Deactivation of beacons and reset to posted speed limits gives motorist real-time information
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