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This chapter has presented the basic concepts of speed studies.
Spot speed studies are conducted to estimate the distribution of speeds of
vehicle in the traffic stream at a particular position on highway.
This is done by recording the speeds of vehicle at the specified location.
These data are used to obtain speed characteristics such as mean speed, modal
speed, pace, standard deviation and different percentile of speeds.
The important factors which should consider during plan of studies is the
location of study, time and duration of study.
The data sample collected should contain samples size.
These gives precision and accuracy of result.
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