or other devices for data storage transfer timing and communication of the sensors to the sensor monitoring unit 8 the sensor monitoring unit 8 may also be in communication with a central processing unit 12 in one embodiment information from the sensor monitoring unit 8 is communicated to the central processing unit 12 and stored communication software and or data assessment software may be installed on the sensor monitoring unit 8 and or the central processing unit 12 communications to the central processing unit 12 may be further processed and or stored permanently or temporarily on the central processing unit 12 communications may also be relayed or transferred to a remote location the central processing unit 12 may optionally be interconnected to a number of peripheral devices including without limitation a visual display unit 14 a keyboard or mouse or touch screen a printer and or other suitable peripheral devices for displaying data or calculations or providing input of commands signals etc the sensor monitoring unit 8 central processing unit 12 visual display unit 14 and any peripheral devices may be located together or separately at any suitable location or locations and comprise any suitable computer configuration each first sensor 2 second sensor 4 sensor monitoring unit 8 central processing unit 12 and visual display unit 14 and any peripheral devices may communicate by any number of conventional communication paths for example but not intended to limit the scope of the invention communication paths could be a hardwire communication link such as signal cable and or a wireless path such as a radio link cellular path and or satellite link each first sensor 2 and each second sensor 4 may be any suitable design capable of sensing the passing or proximity of a moving object along a railway 6.