Pre-standard DIN V VDE V 0832-300, Publication date: 2008-10 Road Traffic Signal Systems - Part 300: Technical Requirements for Signal Heads with LED

Pre-standard DIN V VDE V 0832-400, Publication date: 2008-12 Road Traffic Signal Systems - Part 400: Traffic Management Systems

Pre-standard DIN V VDE V 0832-500, Publication date: 2008-01 Road Traffic Signal Systems - Part 500: Safety related Software for road traffic signal systems

Pre-standard DIN CLC/TS 50509, Publication date: 2008-05 Use of LED signal heads in road traffic signal systems; German version CLC/TS 50509:2007