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For the investment requirements modeling process to calculate capacity and estimate delay.
(HPMS) Highway Performance
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Guidance:
It is difficult to determine coordinated signals from field observations, therefore the best source of such data may be traffic engineering departments or traffic signal timing plans. However, if such information cannot be obtained, field inspection and/or observation may be necessary. Code “4” – Coordinated Real-Time Traffic Adaptive is difficult to determine from field reviews and may require discussion with local traffic engineering personnel. It is good practice to always contact the agencies responsible for the signals in question to obtain information on the type of signal and green time when available.