PDS are leading Systems Integration Specialists with over 26 years of experience in road tunnels. Designing and delivering innovative turnkey solutions and providing on-going support for refurbishment and new build projects world-wide. With expertise in high availability critical infrastructure control systems, specialist sub-systems and their integration, backed by a lifetime support capability unrivalled in our industry. Our capabilities range from SCADA installations, PLC integration through to fully resilient integrated end to end solutions. They encompass all plant technologies including video and audio systems, lighting, ventilation, traffic control & monitoring, motor & pump control, CCTV with VAID, PA and telephones.