Condition-responsive systems

Condition-responsive systems identify and provide motorist guidance about real-time, atypical roadway conditions, especially hazardous or unique roadway and weather conditions. Condition-responsive systems include these automated applications:

• Changeable Speed Limits easily provide the ability to automatically change the work zone speed limit without manually covering permanent signs. This system allows the flexibility to vary the work zone speed limit using pre-programmed parameters based on the time of day, day of week, or other changing conditions.
• Hazardous Roadway Warnings dynamically caution motorists about dangerous and/or unexpected roadway conditions. This application can detect weather-related changes and incidents requiring changes in driver behavior (e.g., a blocked lane).
• Trucks Entry/Exit/Crossing Warnings are useful in temporary traffic control applications in which trucks must use the mainline roadway. When trucks are unable to accelerate, decelerate, or cross the roadway without necessitating changes in driver behavior, such as lane or speed changes, this system automatically provides alerts to drivers.