In 2003 the Welsh Assembly Government adopted industry standard Internet Protocol (IP) as a common transmission technique for all trunk and roadside communications. Historically, transmission of communications signals (including data, video and voice) across roadside communications infrastructure has been carried out on a system by system basis. The prospective benefits of a common infrastructure based around IP led to the Welsh Assembly Government's decision, enabling all communications signals, within transmission buildings and control offices, on trunk routes and out to roadside equipment to be delivered in this manner. Immediate and measurable benefits were attained through allowing industry standard hardware and software to seamlessly integrate into the motorway infrastructure without the need for specialist engineering support and therefore lowering costs in both capital and maintenance.
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