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 Title: |
US4727371:
Traffic control system and devices for alleviating traffic flow problems at roadway junction
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Wulkowicz, Robert M.; Chicago, IL 60625
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| Assignee: |
None
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| Published / Filed: |
1988-02-23
/ 1985-12-26
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| Application Number: |
US1985000813588
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| IPC Code: |
Advanced:
G08G 1/07;
G08G 1/09;
Core:
more...
IPC-7:
G08G 1/07;
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| U.S. Class: |
Current:
340/917;
340/905;
Original:
340/917;
340/905;
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| Field of Search: |
340/905,917,919,988,989,990,22,104
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| Priority Number: |
| 1985-12-26 |
US1985000813588 |
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| Abstract: |
The present invention overcomes the inadequacies of prior traffic controls by providing a system for a traffic junction between vehicle paths which includes a first detector for detecting the position of a first vehicle along a first vehicle path. The system includes a dynamic roadway sign for displaying the junction, the vehicle paths and the relative position of the first vehicle to the junction. The dynamic roadway sign is positioned along a second vehicle path, to be visible to any vehicles on the second vehicle path approaching the junction. The dynamic roadway sign is positioned sufficiently prior to the junction to allow sufficient time for vehicles travelling on the second vehicle path to react without abrupt manuevers to avoid collision with the first vehicle at the junction. The dynamic roadway sign would include a graphic display of the junction for the vehicle paths, and icons positioned in sequence in one of the vehicle paths. Each of the icons is illuminated to indicate the presence of a vehicle at a pre-determined position on the vehicle path and its relative position to the junction.
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| Attorney, Agent or Firm: |
Chalfie, Edward J. ;
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| Primary / Asst. Examiners: |
Rowland, James L.; Tumm, Brian R.
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Designated Country: |
AT BE CH DE FR GB IT LI LU NL SE DK EP FI JP NO
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| Family: |
Show 11 known family members
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First Claim:
Show all 17 claims |
I claim:
1. A traffic control system for a traffic junction between a plurality of vehicle paths comprising: first means for detecting the position of a first vehicle along a first vehicle path relative to the junction; means for graphically displaying the junction, the plurality of vehicle paths and the relative position of the first vehicle to the junction whereby vehicles on the second vehicle path approaching said junction do not require a direct view of the first vehicle before the first vehicle enters the junction to avoid collision with said first vehicle.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 14 U.S. patent(s) that reference this one
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