Communications: electrical – Override of traffic control indicator by command transmitter
Patent
1985-12-16
1987-11-03
Rowland, James L.
Communications: electrical
Override of traffic control indicator by command transmitter
G08G 107
Patent
active
047046104
ABSTRACT:
A system for providing early warning of the approach and egress of emergency vehicles in which the warning system provides a display to indicate the direction from which the emergency vehicle is approaching and in addition provides preemption control of the traffic signals at an intersection. A transmitter mounted on an emergency vehicle transmits a signal whenever it is on an emergency call which is received by infrared (I.R.) receivers positioned at an intersection to respond to the transmitted signals. The received signal is then processed by a master controller which in turn pre-empts operation of traffic signals to control traffic flow at the intersection to which the emergency vehicle is approaching. The master controller also provides an output to display signs facing approaching traffic on each road approaching the intersection which displays messages and symbols indicating the direction of the approaching emergency vehicle. Additionally, the display system indicates whether the emergency vehicle has passed through and is departing the intersection. After a predetermined interval when an emergency vehicle has passed through an intersection the display system is deactivated and the traffic signals are returned to the traffic light control system.
REFERENCES:
patent: 2881409 (1959-04-01), Cook et al.
patent: 2981878 (1961-04-01), Henderson
patent: 3020522 (1962-02-01), Lesher
patent: 3114127 (1963-12-01), Ramsey
patent: 3247482 (1966-04-01), Lesher
patent: 3255433 (1966-06-01), Lesher
patent: 3257641 (1966-06-01), Campana et al.
patent: 3550078 (1970-12-01), Long
patent: 3638179 (1972-01-01), Coll et al.
patent: 3784970 (1974-01-01), Simpkin
patent: 3881169 (1975-04-01), Malach
patent: 4016532 (1977-04-01), Rose
patent: 4017825 (1977-04-01), Pichey
patent: 4135144 (1979-01-01), Elmasian
patent: 4162477 (1979-07-01), Munkberg
patent: 4223295 (1980-09-01), Bonner et al.
patent: 4228419 (1980-10-01), Anderson
patent: 4234967 (1980-11-01), Henschel
patent: 4321589 (1982-03-01), King
patent: 4443783 (1984-04-01), Mitchell
patent: 4463339 (1984-07-01), Frick et al.
patent: 4573049 (1986-02-01), Obeck
Davidson James
Pfister Henry
Smith Michel R.
O'Reilly David
Rowland James L.
Tumm Brian R.
LandOfFree
Emergency vehicle warning and traffic control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Emergency vehicle warning and traffic control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergency vehicle warning and traffic control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1676126