Vehicle-responsive systems
Vehicle-responsive systems continuously evaluate individual vehicle characteristics and automatically produce warnings directed to those vehicles. Vehicle-responsive systems include:
- Dynamic Speed Displays automatically indicate the current speed and the posted speed limit to each passing driver. This application may be especially valuable when workers are adjacent to the open lane of traffic or when roadway conditions are especially hazardous part of the work zone.
- Work Space Intrusion Warnings automatically alert drivers and workers when a vehicle inadvertently enters a construction zone or work space. This system may be implemented if the truck exit is difficult to identify or when tailgating is associated with high roadway volume.
- Over Dimension Warnings are used when a minimal clearance condition exists. When a vehicle is over dimension, this system automatically alerts drivers in advance of the alternate route the driver should take. If the driver does not take the alternate route, the warning system directs the driver to stop.
Projects references
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I-35W/Crosstown WZ Enhancements Minnesota DOT (MNDOT) asked us to provide temporary replacement sensors (via an XML feed into their Regional Traffic Management Center - RTMC) for all of the roadway loop detectors they lost during construction on one the Twin Cities busiest sections of roadway (250,000 ADT). The replacement sensors keep the RTMC’s In addition, after the project started, MNDOT was experiencing speed related crashes in a lane transition area. We were able to rapidly deploy a speed activated PCMS that warned vehicles with excessive speed to “REDCUCE SPEED-CURVES AHEAD”. Through our JamLogic server, MNDOT and their consultants are able to monitor the system and loops. Application: Vehicle Responsive – Excessive Speed Warning, ITS Camera & Loop Replacements  Project datasheet (397k) |
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School Bus Stop Flasher System The Minnesota Department of Transportation(Mn/DOT) Studied and funded this rural ITS installation as part of Federally Funded ITS Rural Deployment Program. The goal of this installation was to help reduce near misses and crashes related to this rural highspeed (55mph) blind bus stop. The system was deployed along StateHwy 67 which is a Minnesota River Valley Scenic Byway with limited horizontal and vertical sight distance. JamLogic was chosen to develop and install this wireless solar powered rural bus stop fully automated warning system for use by the Bennett & Bennett Bus Company. Application: Rural ITS Vehicle Responsive-Conflict Warning Project datasheet (397k) |
