"Intelligent Transport Systems and Services" (ITS) includes cooperative systems - for vehicles that communicate with each other and with roadside infrastructure, via radio interface. Such systems will enhance the support for drivers and other road users, meaning more efficient transport and safer roads.
ITS communication equipment intended for road safety clearly needs protections: to avoid delays - and ensure that warning messages always get through at the critical moment. However, not enough protection can be found in the 5 GHz Radio Local Area Networks (RLAN) bands or in the 5.8 GHz Industrial, Scientific and Medical (ISM) frequency band, which were previously regarded as viable for non-critical road safety and traffic management applications and communications purposes.
The Commission Decision on ITS in the 5.9 GHz band was developed in co-operation with the Member States and the CEPT. The Decision received a positive regulatory opinion from the Radio Spectrum Committee in June 2008, and was adopted by the Commission on 5 August 2008.
The Decision harmonises the conditions for use of the 5875-5905 MHz frequency band for safety related applications of ITS on a non-exclusive basis. In other words, its main objective is to provide for relatively interference-free frequencies to be used by the safety-related communications, which must be reliable and without excessive latency – an important point for time-critical safety messages.