Proximity detectors; vehicle and machinery proximity indication equipment, including computer hardware; vehicle and machinery proximity indication devices; vehicle and machinery proximity indication apparatus; vehicle and machinery proximity detectors; vehicle proximity alert and collision avoidance systems; proximity and warning devices for personal safety, including devices for alerting persons to the proximity of nearby vehicles or machinery; sensing equipment and apparatus, including such goods used for detection of vehicle and machinery proximity; computer hardware and software in this class, including computer hardware and software relating to vehicle and machinery proximity detection, sensing, communication and reporting apparatus; parts and fittings for the aforesaid goods