Examples described herein provide a method for overspeed protection of a motor of a gate crossing mechanism. The method includes monitoring, by an overspeed protection circuit, a voltage across a first Zener diode and a second Zener diode. An anode of the first Zener diode is connected to an anode of the second Zener diode. The method further includes, responsive to determining that a Zener voltage threshold is exceeded, allowing a current to flow into a gate pin of a triac. The triac controls the motor of the gate crossing mechanism.

Systems and methods for detecting or predicting potential collisions between vehicles are provided. The systems and methods may receive sensor output indicative of a location, a heading, and/or a moving speed of a first vehicle and/or a second vehicle. The systems and methods may predict a collision between the vehicles at an intersection between routes based on the received sensor output. The systems and methods may change movement of the first vehicle and/or the second vehicle responsive to predicting the collision.

A radar monitoring system and a radar monitoring method for monitoring a traffic control zone involve installing two radars near the traffic control zone so that the radars emit radar waves covering the traffic control zone and serve as backups for each other; locating any object in the traffic control zone as a coordinate point with respect to a set of X and Y coordinate axes, and subjecting the X and Y coordinate axes of the two radars to axial normalization, so that an identical object in the traffic control zone is located by the first radar and the second radar at approximately the same coordinate point. An alert area is defined in the traffic control zone and an excluded area around a resident facility in the traffic control zone is excluded from the alert area. When an object in the alert area is determined as an obstacle, an alert is triggered.

A radar monitoring system and a radar monitoring method for monitoring a traffic control zone involve installing two radars near the traffic control zone so that the radars emit radar waves covering the traffic control zone and serve as backups for each other; locating any object in the traffic control zone as a coordinate point with respect to a set of X and Y coordinate axes, and subjecting the X and Y coordinate axes of the two radars to axial normalization, so that an identical object in the traffic control zone is located by the first radar and the second radar at approximately the same coordinate point. An alert area is defined in the traffic control zone and an excluded area around a resident facility in the traffic control zone is excluded from the alert area. When an object in the alert area is determined as an obstacle, an alert is triggered.

Various embodiments of an autonomous rail vehicle that can travel ahead of a locomotive at a distance proportional to the locomotive's stopping capability are disclosed. The rail vehicle may scan its surroundings, gauges track conditions, and communicates with locomotive operators of the scanned results in real-time to timely enable activation of the locomotive's emergency brakes in case of detection of off-normal track conditions. The rail vehicle may paired with the locomotive and provides eyes to locomotive operators so that they can have information on tracks viability well ahead of the locomotive.

Various embodiments of an autonomous rail vehicle that can travel ahead of a locomotive at a distance proportional to the locomotive's stopping capability are disclosed. The rail vehicle may scan its surroundings, gauges track conditions, and communicates with locomotive operators of the scanned results in real-time to timely enable activation of the locomotive's emergency brakes in case of detection of off-normal track conditions. The rail vehicle may paired with the locomotive and provides eyes to locomotive operators so that they can have information on tracks viability well ahead of the locomotive.

A system includes one or more processors. The one or more processors are configured to receive crossing obstruction information from an optical sensor disposed proximate a crossing of a route traversed by a vehicle, with the crossing obstruction information indicating a presence of an obstruction to the crossing; obtain position information indicating a position of the vehicle traversing the route; determine proximity information of the vehicle indicating proximity of the vehicle to the crossing using the position information; determine a presence or absence of an alert state indicating a potential of the crossing being obstructed using the crossing obstruction information and the proximity information; and perform a responsive activity based responsive to a determination of the presence of the alert state.

The present invention provides a gantry type movable catenary system at railway crossing having a simple and reliable structure, which can be applied to a conventional railway crossing as well as to a new railway crossing, and at the same time is improved such that service and maintenance are easy. The gantry type movable catenary system according to the present invention comprises: a pair of auxiliary rails 110 with a fixed length installed in parallel with railway rails 10 from the right and left outsides of the railway rails at the crossing; a frame structure of which a lower end is installed on the auxiliary rail, the frame structure being connected with a drive motor 130 to be reciprocally movable on the auxiliary rail; a movable contact wire 160 with a certain length connected via an insulator 152 on top of the frame structure and installed to parallel to a catenary wire 20; and a control unit which controls driving of the drive motor to operate the positioning of the frame structure, wherein, from a first power connecting section 21 of the catenary wire 20, a second power connecting section 161 of the both ends of the movable contact wire 160 is connected or disconnected depending on reciprocal movement of the frame structure, thus supplying or disconnecting electric power.

The present invention provides a gantry type movable catenary system at railway crossing having a simple and reliable structure, which can be applied to a conventional railway crossing as well as to a new railway crossing, and at the same time is improved such that service and maintenance are easy. The gantry type movable catenary system according to the present invention comprises: a pair of auxiliary rails 110 with a fixed length installed in parallel with railway rails 10 from the right and left outsides of the railway rails at the crossing; a frame structure of which a lower end is installed on the auxiliary rail, the frame structure being connected with a drive motor 130 to be reciprocally movable on the auxiliary rail; a movable contact wire 160 with a certain length connected via an insulator 152 on top of the frame structure and installed to parallel to a catenary wire 20; and a control unit which controls driving of the drive motor to operate the positioning of the frame structure, wherein, from a first power connecting section 21 of the catenary wire 20, a second power connecting section 161 of the both ends of the movable contact wire 160 is connected or disconnected depending on reciprocal movement of the frame structure, thus supplying or disconnecting electric power.

A train simulator test set is disclosed that can be operably coupled to a railroad track to measure the resting impedance of that track circuit and simulate a train by varying the railroad track inductance over a set period of time. The test set can select the speed, direction, and number of trains to simulate. By applying a variable inductance on the railroad tracks, the test set can simulate a train moving at variable speeds toward and away from the island. The test set can apply inductances to the railroad tracks to simulate two or more trains moving in each direction of the tracks at the same time, along with multiple looks and routes. The train simulator test set can include simulation software to vary the parameters of the train simulation and couple a variable inductance on the railroad tracks.