CHapter 44 TrEfffcc ontodlaratMWbessureeHEopuppnertt b. The locations of data collection Traffic flow traffic incident emission the determination of the locations of detectors will be based on the purposes like, and on practical situations like under road at bridge or in sky etcb. The Locations of Data Collection Traffic flow, traffic incident, emission The determination of the locations of detectors will be based on the purposes like, and on practical situations like under road, at bridge or in sky etc.. Chapter 4 Traffic Control and Measure Equipment Chapter 4 Traffic Control and Measure Equipment