9 Systems composed of ulatrawide band radios, electronic sensors and control modules for facilitating train control functions, for detecting potentially dangerous or important conditions on or near a railroad and for the purpose of increasing productivity and operational efficiency, and used in the transit or railway industries, namely, potential collisions between railway vehicles or trains, maintenance of safe operating / optimal distance between trains, precision berthing of trains, protection of roadway workers, potential derailments, and dangerous environmental conditions