Variable speed limit system
First Claim
1. A variable speed limit system controller for communicating with a traffic station to determine a speed limit based upon input provided by a sensor in the station, and with a display for displaying a variable speed limit, the controller comprising:
- an input for receiving information related to lane occupancy and at least one of traffic flow, road conditions, vehicle speed, vehicle presence and weather conditions, from the sensor;
an output for transmitting a derived speed limit to the display; and
a processor for receiving the information from the input, for determining the derived speed limit for a region adjacent to the station, based on the received information, and for providing the derived speed limit to the output for transmission to the display.
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Accused Products
Abstract
A variable speed limit work zone safety system is provided herein. It includes at least two spaced-apart stations. Each station includes a plurality of sensors to gather information relative to at least one of traffic flow and road conditions. The station includes a controller which is programmed to analyse data which is received from the sensors and to derive, therefrom, an optimum speed limit at a selected location adjacent to, or in, the work zone. The station further includes a communication sub-system to communicate data related to the optimum speed limit to a message board to display the optimum speed to motorists.
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Citations
25 Claims
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1. A variable speed limit system controller for communicating with a traffic station to determine a speed limit based upon input provided by a sensor in the station, and with a display for displaying a variable speed limit, the controller comprising:
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an input for receiving information related to lane occupancy and at least one of traffic flow, road conditions, vehicle speed, vehicle presence and weather conditions, from the sensor;
an output for transmitting a derived speed limit to the display; and
a processor for receiving the information from the input, for determining the derived speed limit for a region adjacent to the station, based on the received information, and for providing the derived speed limit to the output for transmission to the display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification