9 Apparatus and instruments in the field of traffic surveillance, alarm systems as well as installations of alarms in traffic situations including railway traffic and railway and track building sites; namely, electric and electronic, optical, acoustic and automatic signalling, controlling and warning installations, apparatus and instruments, consisting principally of movement, metal and weight sensors and computer interface boards to detect traffic and movement, wired and wireless communication units, namely, radios, telephones, and luminous signals, namely, light emitting diodes, electrical controllers, emergency warning lights and acoustic alarms and activators to effect vehicle movement, namely, luminous alarm signals, acoustic horns, headphones and hearing aids; apparatus for recording, transmission or reproduction of data and sound, namely, videorecorders, audiorecorders, computer monitors; data processing equipment, namely computers, computer hardware and computer software in the nature of database management programs and operating systems for use in the field of traffic surveillance, alarm systems and warning systems; as well as peripherals and parts for all the foregoing goods