Theory of equipment hinges around double integration process performed by electronic circuit, and planimeter on chart of recording voltmeter; instrument automatically provides full permanent record of time of arrival of vehicles, maximum delay on red, and operation of signals, as well as total delay on red; it was designed for use in Philadelphia and provides quantitative data needed by engineer to set accurately any type of traffic control equipment.
New traffic delay measuring device
Traffic Eng
Traffic Engineering ; 27 , n 5
1957
Article (Journal)
English
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