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ITS include sensor, communication, and traffic control technologies.
Intelligence requires information, and information requires data, which is
generated by surveillance.
Vehicle detection and surveillance technologies are an integral part of ITS,
since they gather all or part of the data that is used in ITS.
A detailed introduction and importance of ITS and different types of data
involved have been discussed in this chapter.
Technology regarding the data collection techniques on conventional and non
conventional methods has been presented in the following chapter.
A detailed different technology system, their principles, advantages,
disadvantages and type of data collected by each system have been discussed in
this chapter.
Application part of travel time by probe vehicle and vehicle signature by some
technologies has been presented.
Detailed travel time estimation by different techniques has been discussed in
this chapter.
Also travel time estimation by vehicle technology and emerging techniques such
as vehicle signature have also been discussed in this chapter.
Each detector technology and particular device has its own limitations and
individual capability.
The successful application of detector technologies largely depends on
proper device selection.
Many factors impact detector selection, such as data type, data accuracy,
ease of installation, cost and reliability.
Vehicle technologies are well advanced compared to the in-situ technology
detectors for travel time.
A non- Intrusive technology is very effective compared to the Intrusive
technologies.
Pneumatic road tube sensors are more suitable for small sample and short
duration period but it can’t detect two wheelers.
ILD’s are flexible to satisfy different variety of applications, but
installation requires pavement disturb.
Magnetic sensors provide traffic measurements more accurate and more
informative than loop detector measurements, but it can’t detect the stopped
vehicle.
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