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Traffic Signal Standards. History Chaos NEMA (TS 1) 170 (CALTRANS / NY) 170E 179 470i NEMA TS 2 2070 ATC 2070N Memory Plug-in Others... Electromechanical.
Documents Traffic Signal Standards. History Chaos NEMA (TS 1) 170 (CALTRANS / NY) 170E 179 470i NEMA TS 2 2070...

Slide 1 Traffic Signal Standards Slide 2 History Chaos NEMA (TS 1) 170 (CALTRANS / NY) 170E 179 470i NEMA TS 2 2070 ATC 2070N Memory Plug-in Others... Electromechanical In…

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