"State-of-the-art" Report on Non-traditional Traffic Counting Methods
The purpose of this report is to look at the state-of-the-art of non-traditional traffic counting methods. This is done through a three-fold approach that includes an assessment of currently available technology, a survey of State Department of Transportation practices, and a review of the literature. Traditional traffic counting has utilized intrusive devices including bending plate, pneumatic road tube, inductive loops, and piezo-electric sensors. As safety, cost, increased traffic flow, complex road geometrics, and traffic disruption have become issues of concern, traffic counting professionals are looking more closely at alternatives to traditional methods of data collection. Such non-traditional traffic counting devices as video image detection, Doppler microwave, passive magnetic, passive acoustic, active and passive infrared, and active and passive ultrasonic are being considered due to their non-intrusive nature. Information on available technology including cost, installation requirements, technical specifications, data retrieval, and limitations of the products are addressed. This information is followed by a summary of State practices that shows very limited usage of non-intrusive technology. Lastly, a review of the literature indicates there is little in the way of "new" technology. However, several evaluations of non-intrusive devices provide valuable information to traffic counting professionals that will assist in decision-making regarding upgrades to current practices.
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accuracy active infrared bending plate Class WIM classiﬁcation data Contact Information Count Speed Weight data collection devices Department of Transportation detection devices detectors Diamond Trafﬁc Disadvantages Reported Doppler microwave EIS Electronic Integrated Electronic Integrated Systems equipment Evaluation Federal Highway Administration ﬁeld ﬂow Frequency of Method Golden River TRAFFIC Guidestar identiﬁed inductive loops installation requirements Intelligent Transportation Systems Intemational Road International Road Dynamics ITC Pat America Iteris JAMAR Technologies lane of trafﬁc level of satisfaction manual observation manufacturers monitored neural network software non-intrusive devices Non-Intrusive Technologies Nu-Metrics passive acoustic passive infrared Peek Trafﬁc Peek piezo-electric sensor pneumatic road tube pneumatic rubber tube radar reﬂected road surface roadside roadway Safetran sensor technology sensor type serial communication speciﬁc Speed Weight Class Table Texas Transportation Institute trafﬁc counting devices trafﬁc data collection Trafﬁc Peek Trafﬁc ultrasonic vehicle count Vehicle Detection video image detection X X X X