The long awaited update to the Traffic Signal Controller Specification Forms, still commonly referred to as 141’s, h…https://t.co/lvpokcqva6 directly from Twitter

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via Twitter https://twitter.com/AlistairGollop

September 20, 2017 at 10:08AM

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The long awaited update to the Traffic Signal Controller Specification Forms, still commonly referred to as 141’s, h…https://t.co/lvpokcqva6 directly from Twitter