Abstract: A traffic control preemption system monitors an operating state of a railroad crossing, without requiring an interface with railroad crossing equipment, and communicates information to a traffic controller of an adjacent signalized roadway intersection to improve vehicular traffic flow at the railroad crossing. The traffic control preemption system is configured to make real time health assessments of preemption system functionality and provide a degree of redundancy and failsafe operation to the traffic control system.

Abstract: A railroad car location, speed and heading sensor system including at least one self-powered, tie-mounted sensor node that is applicable universally to different railroad settings without using track circuits, inductive loops, radar systems, and wheel counters and associated disadvantages. Reliable and relatively low cost deterministic and redundant car presence detection is realized when multiple sensor nodes are arranged in a network, which may be a wireless mesh network, that is not affected by environmental conditions.

Abstract: Railroad crossing object detection systems and methods include radar sensors detecting object presence, speed and heading in a different manner. A controller compares signal outputs from the different sensors to provide traffic control preemption signals and self-diagnose sensor problems. The sensor devices may include an ultra-wideband (UWB) impulse radar device and at least one reflective device providing failsafe object presence detection and object non-presence detection in redundant fashion with at least a second sensor device such as a side-fired radar device.

Abstract: A video analytic sensor system and methods for sensing an operating state of a railroad crossing gate processes images to detect and communicate railroad crossing gate position information to non-railroad systems such as vehicular traffic control systems. The sensor system may be retrofit to existing railroad crossing gates and does not require modification to or direct connection with existing railroad systems.

Abstract: Railroad object detection systems and methods include radar sensors detecting object presence, speed and heading in a different manner. A controller compares signal outputs from the different sensors to make real time health assessments and self-diagnose sensor problems in a railroad application. The sensor devices may include an ultra-wideband (UWB) impulse radar device and at least one reflective device providing failsafe object presence detection and object non-presence detection in redundant fashion with at least a second sensor device such as a side-fired radar device.

Abstract: A traffic control preemption system monitors an operating state of a railroad crossing, without requiring an interface with railroad crossing equipment, and communicates information to a traffic controller of an adjacent signalized roadway intersection to improve vehicular traffic flow at the railroad crossing. The traffic control preemption system is configured to make real time health assessments of preemption system functionality and provide a degree of redundancy and failsafe operation to the traffic control system.

Abstract: A railroad car location, speed and heading sensor system including at least one self-powered, tie-mounted sensor node that is applicable universally to different railroad settings without using track circuits, inductive loops, radar systems, and wheel counters and associated disadvantages. Reliable and relatively low cost deterministic and redundant car presence detection is realized when multiple sensor nodes are arranged in a network, which may be a wireless mesh network, that is not affected by environmental conditions.

Abstract: A blocked rail crossing detection and notification system is described. The system includes a processing device, a communications interface communicatively coupled to the processing device and operable for facilitating communications between the processing device and at least one external device, and at least one vehicle detection mechanism placed proximate to a rail grade crossing. The at least one vehicle detection mechanism is communicatively coupled to the processing device and operable to provide signals to the processing device indicative of the presence or non-presence of a vehicle within a defined area surrounding an intersection of a roadway and one or more railroad tracks. The processing device is further programmed to communicate the presence or non-presence of a vehicle along with supporting correlative visual data within the defined area to the at least one external device via the communications interface.

Abstract: A system includes a base station associated with a railroad crossing having a unique identifier and comprising at least one processor to wirelessly transmit a proximity alert, determine that a train is on approach, and wirelessly transmit a train-on-approach notification. The system further includes a receiver comprising at least one processor to wirelessly receive the proximity alert and the train-on-approach notification from the base station and to provide at least one of a visual and audible indication responsive to at least one of the proximity alert and the train-on-approach notification.

Abstract: A blocked rail crossing detection and notification system is described. The system includes a processing device, a communications interface communicatively coupled to the processing device and operable for facilitating communications between the processing device and at least one external device, and at least one vehicle detection mechanism placed proximate to a rail grade crossing. The at least one vehicle detection mechanism is communicatively coupled to the processing device and operable to provide signals to the processing device indicative of the presence or non-presence of a vehicle within a defined area surrounding an intersection of a roadway and one or more railroad tracks. The processing device is further programmed to communicate the presence or non-presence of a vehicle along with supporting correlative visual data within the defined area to the at least one external device via the communications interface.