发明名称 |
Variable speed limit system |
摘要 |
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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申请公布号 |
US6825778(B2) |
申请公布日期 |
2004.11.30 |
申请号 |
US20020274042 |
申请日期 |
2002.10.21 |
申请人 |
INTERNATIONAL ROAD DYNAMICS INC. |
发明人 |
BERGAN TERRY;BUSHMAN ROBERT |
分类号 |
G08G1/01;(IPC1-7):G08B1/01 |
主分类号 |
G08G1/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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