An electric rail system includes a current collector mounted for movement along at least one rail of the electric rail system and a monitoring system for detecting a condition indicative of a problem with the rail system or the current collector. The monitoring system includes a detector having one or more of: a camera configured to record images of a portion of the rail system in front of or behind the current collector, at least one vibration sensor on at least one slip contact of the current collector, an optical spark sensor configured to detect sparks in a contact region between the slip contact and the at least one rail, and at least one distance sensor configured to detect a distance between the at least one distance sensor and the at least one rail.

An electric rail system includes a current collector mounted for movement along at least one rail of the electric rail system and a monitoring system for detecting a condition indicative of a problem with the rail system or the current collector. The monitoring system includes a detector having one or more of: a camera configured to record images of a portion of the rail system in front of or behind the current collector, at least one vibration sensor on at least one slip contact of the current collector, an optical spark sensor configured to detect sparks in a contact region between the slip contact and the at least one rail, and at least one distance sensor configured to detect a distance between the at least one distance sensor and the at least one rail.

A system includes at least one application device, a control unit, at least one detection device, and at least one processor configured to be disposed on-board a vehicle system. The at least one application device is configured to be at least one of conductively or inductively coupled with at least one conductive track of a route traveled by the vehicle system. The control unit is configured to control the at least one application device to electrically inject at least one examination signal into the conductive tracks. The at least one detection device is configured to detect the examination signal passing through a test loop. The at least one processor is configured to identify a failure of the vehicle to adequately shunt electrical signals between the conductive tracks based upon the examination signal detected by the at least one detection device.