Patent ID: 6222461
Filing Date: 2001-04-24
Classification: B61L,G08G

Abstract:
An emergency warning system in combination with a roadway vehicle(20) and a locomotive(10), transmitter means(15) mounted on said locomotive for transmitting a single radio frequency(A) dedicated only to trains,receiver means(25) mounted on said roadway vehicle for said single frequency dedicated only to trains, display means(26) mounted within said roadway vehicle for indicating to an operator an approaching train condition,activation means(16) connected to said locomotive transmitter(15) for turning on said transmitter when said locomotive is in forward motion,said emergency warning system providing means whereby said single dedicated train frequency(A) is transmitted directly from said locomotive(10) to said roadway vehicle(20),said receiver(25) in said roadway vehicle being capable of receiving at least one other dedicated frequency(B) means which is dedicated only to an emergency vehicle such as an ambulance,wherein the receiver means(25) mounted in said roadway vehicle is also capable of receiving a third dedicated frequency which is dedicated only to an emergency vehicle such as a fire truck, said receiver means(25) mounted in said roadway vehicle being also capable of receiving a fourth dedicated frequency(D) which is dedicated only to an emergency vehicle such as a police unit,wherein a rear portion(10a) of said locomotive or train has a transmitter means(15a) to transmit a signal(19) in a rearward direction, said signal being of a certain dedicated frequency(A) dedicated only to locomotives and trains, wherein each of said locomotive transmitter means(15,15a) are separate and distinct from any F S K or head end transmitter which may be contained in said locomotive,wherein said rear transmitter means(15a) is activated by a rearward motion sensor(16a), said rear transmitter means(15a) being capable of being manually activated by means(17a) so the locomotive operator can indicate that motion is about to occur in a rearward direction,wherein said forward motion transmitter means(15) is capable of being manually activated by means(17) so the locomotive operator can indicate that motion is about to occur in a forward direction,wherein said emergency vehicles(40) such as a police car, fire truck or ambulance are equipped with a forward transmitter(45) for transmitting a forward signal(48),and wherein said emergency vehicles(40) are also equipped with a rear manually activated transmitter(45a) means to transmit a rearward signal(49) to warn motorists of a roadside emergency.