Vehicular incursion alert systems and methods

A system comprising:

• a vehicle receiver/interface device which is connectable to a Controller Area Network (CAN) or Local Interconnect Network (LIN) of a service vehicle that has at least one of:
• a horn, siren, light, or public address system that can be actuated through said Controller Area Network (CAN) or Local Interconnect Network (LIN);
• and
• at least one incursion sensing device positionable a spaced distance away from the service vehicle on or near an edge or boundary of a protected area;
• wherein said at least one incursion sensing device comprises a sensor which senses an incursion event indicative of a vehicle crossing said edge or boundary of the protected area, and a transmitter which wirelessly transmits an incursion signal to the vehicle receiver/interface device when the incursion sensing device senses an incursion event;
• and
• wherein the vehicle receiver/interface device comprises a receiver configured to receive said wireless incursion signal and circuitry configured to cause said at least one of:
• a horn, siren, light or public address system, to emit an incursion alarm in response to receipt of said incursion signal.