FR2349900A1 - Synchronisation of traffic light signals - uses transmission of short range radio wave for central transmitter to first set and subsequent retransmission to sets along route - Google Patents
Synchronisation of traffic light signals - uses transmission of short range radio wave for central transmitter to first set and subsequent retransmission to sets along routeInfo
- Publication number
- FR2349900A1 FR2349900A1 FR7612733A FR7612733A FR2349900A1 FR 2349900 A1 FR2349900 A1 FR 2349900A1 FR 7612733 A FR7612733 A FR 7612733A FR 7612733 A FR7612733 A FR 7612733A FR 2349900 A1 FR2349900 A1 FR 2349900A1
- Authority
- FR
- France
- Prior art keywords
- short range
- traffic light
- crossroads
- light signals
- radio wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
- G08G1/082—Controlling the time between beginning of the same phase of a cycle at adjacent intersections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
Abstract
The method of synchronising traffic light signals is designed to be used at crossroads. From a central control unit (10) a short range directional radio wave is emitted to a first crossroads (27) the wave being in a coded pulse form. This coded wave is received at the cross-roads (27) and the information contained in it is decoded. Traffic light sequence is controlled according to the decoded information. From the first crossroads (27) a short range directional wave identical to the first wave received is transmitted to the next crossroads (37). This sequence of events is repeated for all the other crossroads to be controlled in this synchronised fashion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7612733A FR2349900A1 (en) | 1976-04-29 | 1976-04-29 | Synchronisation of traffic light signals - uses transmission of short range radio wave for central transmitter to first set and subsequent retransmission to sets along route |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7612733A FR2349900A1 (en) | 1976-04-29 | 1976-04-29 | Synchronisation of traffic light signals - uses transmission of short range radio wave for central transmitter to first set and subsequent retransmission to sets along route |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2349900A1 true FR2349900A1 (en) | 1977-11-25 |
FR2349900B1 FR2349900B1 (en) | 1982-05-21 |
Family
ID=9172454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7612733A Granted FR2349900A1 (en) | 1976-04-29 | 1976-04-29 | Synchronisation of traffic light signals - uses transmission of short range radio wave for central transmitter to first set and subsequent retransmission to sets along route |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2349900A1 (en) |
-
1976
- 1976-04-29 FR FR7612733A patent/FR2349900A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2349900B1 (en) | 1982-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |