Describe the procedure of traffic volume count on any road intersection. Also write the method of representation of traffic volume count data.

Describe the procedure of traffic volume count on any road intersection. Also write the method of representation of traffic volume count data.
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1 Answer

Answer :

The procedure of traffic volume count can be done by any of the methods below:

a) Manual counting

b) Automatic recorders

c) Moving car method

a) Manual counting: In this method, the members of field team collect the necessary information on the prescribed record sheets at the selected points of road-way. The main advantage is that the field team can record the type and direction of vehicles. However, it is not practicable to do manual counting for all the 24 hours of the day and all the days around the year.

b) Automatic recorders

These are mechanical counters which can record automatically the total number of vehicles passing a section of a road in the specified time. They may be either fixed type or portable type. The main advantage is that one can work day and night for the desired period recording total hourly volume of traffic. The disadvantage is that they cannot record the type and direction of vehicles. They may record the data by following methods:

a) Photoelectric cell method

b) Electrical method

c) Pneumatic method

Methods of representation of traffic volume count data:

i) Annual Average Daily Traffic volume (AADT)

ii) Volume flow diagrams at intersection

iii) Variation charts

iv) Traffic flow map

v) Traffic trend charts
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