The National Electrical Manufacturers Association (NEMA) published Amendment 4 to NEMA TS 2-2003 (R2008) Traffic Controller Assemblies with NTCIP Requirements, supporting Flashing Yellow Arrow (FYA) features.
Amendment 4 standardizes the control and monitoring features for FYA, a traffic signal head indication, adding these features to the widely-used NEMA TS 2. In government-sponsored field trials, FYA improved driver performance when yielding to oncoming traffic and pedestrians before making a turn.
Amendment 3 is also new, and modifies NEMA TS 2 provisions for contactors, including revisions to Figure 5-4 and Section 18.104.22.168, and addition of new Section 22.214.171.124.1.
Copies of Amendment 4, for FYA, may be downloaded at no charge by visiting NEMA’s website. Amendment 3, for contactors, may also be downloaded at no charge by visiting NEMA’s website.
NEMA is the association of electrical equipment and medical imaging manufacturers, founded in 1926 and headquartered in Arlington, Virginia. Its member companies manufacture a diverse set of products including power transmission and distribution equipment, lighting systems, factory automation and control systems, and medical diagnostic imaging systems. Worldwide annual sales of NEMA-scope products exceed $120 billion.
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