27-03-2012, 01:55 PM
TRAFFIC STUDY AND FORECASTING
Aftab Ahmed khan.ppt (Size: 1.24 MB / Downloads: 93)
INTRODUCTION TO TRAFFIC ENGINEERING
Definition
Traffic engineering is that branch of engineering which deals with the improvement of traffic performance of road networks and terminals.
Different traffic studies
1 Traffic Volume study,
2. Speed Studies,
i) Spot speed study
ii) Speed and delay study
3. origin and destination study ( O & D)
Speed studies
spot speed
Spot speed is the instantaneous speed of a vehicle at a specified section or location.
Methods of measuring Spot Speeds:
There are two methods
1. Long base methods
2. Short base methods
Spot speed by enoscope
It is one of the simplest method of finding spot speed.
Its principle is the observer is stationed on one side of the road and start a stop watch when a vehicle crosses that section(i.e.,observer).the enoscope is placed at a convenient distance say 30m to 50m,the moment when the vehicle crosses the section where enoscope is fixed,the stop watch is stopped. Time required to cross the known length is found and is converted to speed in KMPH.
Aftab Ahmed khan.ppt (Size: 1.24 MB / Downloads: 93)
INTRODUCTION TO TRAFFIC ENGINEERING
Definition
Traffic engineering is that branch of engineering which deals with the improvement of traffic performance of road networks and terminals.
Different traffic studies
1 Traffic Volume study,
2. Speed Studies,
i) Spot speed study
ii) Speed and delay study
3. origin and destination study ( O & D)
Speed studies
spot speed
Spot speed is the instantaneous speed of a vehicle at a specified section or location.
Methods of measuring Spot Speeds:
There are two methods
1. Long base methods
2. Short base methods
Spot speed by enoscope
It is one of the simplest method of finding spot speed.
Its principle is the observer is stationed on one side of the road and start a stop watch when a vehicle crosses that section(i.e.,observer).the enoscope is placed at a convenient distance say 30m to 50m,the moment when the vehicle crosses the section where enoscope is fixed,the stop watch is stopped. Time required to cross the known length is found and is converted to speed in KMPH.