Energy saving through replacement of traffic light systems

The European union recognizes the large amount of energy consumed for lighting, including Traffic Light Systems (TLS), which reaches 15% of the energy consumption in the EU. Therefore it encourages the creation of several initiatives amongst members to develop policies regarding public lighting applications, in order to increase energy efficiency in public lighting and reduce CO2 emissions. The most commonly used lamp in Cyprus for TLS is Halogen, operated by low voltage controller. Systems featuring improved efficiency, increased lifetime and better light performance are emerging in the world market. This paper provides the results of a pilot project investigating the benefits occurring from the application of Light Emitting Diode (LED) lamps, Low voltage (LV) and Extra low voltage (ELV) controllers, and improvement of the facilities of TLS. Theoretical background and operation principles of each of the technologies are presented. Theoretical concepts are supported by experimental on site measurements collected within the framework of the installation of various types of TLS in the area of Nicosia and Engomi Municipality as pilot project. The cost of equipment and installation of a junction is used to illustrate the payback period for the investment. The results provided the appropriate knowledge to support the replacement of old existing TLS with new innovative systems featuring advanced economy, reliability, power efficiency, security and better management capabilities, and lead to the public tender call opened by the ministry of transport, communications and works of the Cyprus government.