Traffic Characteristics and Traffic Studies - IES Previous Year Questions
11. A journey from work to home made by walking to the bus, travelling by bus to the station and completing the journey by train is regarded as _____ .
[IES 2002]
- 3 trips
- 2 trips
- 1 trip
- 4 trips
Explanation:
The journey between the origin and destination, in one direction is termed as a trip. Here, the journey is made once from work to home by using different modes of transport. Hence, it is considered as 1 trip.
12. Which one of the following is taken into consideration for computing traffic capacity per lane of the highway ?
[IES 2003]
- Trucks and buses
- Two-wheelers
- Equivalent of passenger cars
- Passenger cars and light vehicles
Explanation:
Passenger Car Unit (PCU) is a measure of relative space requirement of a vehicle class compared to that of a passenger car under a specified set of roadway, traffic and other conditions.
13.  Match List-I (Method of traffic volume counts) with List-II (Equipment used) and select the correct answer using the codes given below the lists:
List-I
- Manual count
- Combination of manual and mechanical methods
- Automatic devices
- Photographic method
List-II
- Video-recorder
- Pneumatic tube
- Watch
- Multiple pen recorder
[IES 2003]
-  3  4  1  2
-  4  3  2  1
-  3  4  2  1
-  4  3  1  2
Explanation:
- Watch is used when traffic volume study is carried out manually.
- Multiple pen recorders use different pens to record the crossing of different classes of vehicles over a chart which moves at the speed of a clock. Hence, use of this instrument includes both manual and mechanical works.
- Pneumatic tube is an automatic device to count the number of vehicles using a particular road.
- Video recording is one of the photographic methods to find the traffic volume.
14.  Match List-I (Type of study) with List-II (Data collected) and select the correct answer using the codes given below the lists:
List-IÂ
- Public transport inventory study
- Public transport O-D study
- Public transport usage study
- Public transport operator’s study
List-II
- Starting and destination of riders
- Available routing and scheduling
- Vehicle-km, earning per km
- Passenger-km, IVTT, walking time, waiting time
[IES 2003]
Codes: A B C D
-  2  1  3  4
-  1  2  4  3
-  2  1  4  3
-  1  2  3  4
Explanation:
- Origin and Destination study is carried out to determine the traffic volume along with its origin and destination in each zone.
15.  Match List-I (Traffic survey) with List-II (Method) and select the correct answer using the codes given below the lists:
List-I
- Spot speed
- Traffic volume
- O-D survey
- Parking survey
List-II
- By video tape
- By road side interview
- By doppler radar
- By pneumatic tube
[IES 2005]
Codes: A B C D
-  2  4  3  1
-  3  4  2  1
-  2  1  3  4
-  3  1  2  4
Explanation:
- Doppler radar is used for determining the spot speed of the vehicles.
- Using pneumatic tubes is an automatic method of determining the traffic volume.
- Road side interview is used in origin and destination studies.
16.  On a road, the free speed was 65 kmph and the space headway at jam density was 6.25 m. What is the maximum flow which could be expected on this road ?
[IES 2006]
- 1625 vph
- 1300 vph
- 406 vph
- 2600 vph
Explanation:
Jam density, kj =
Maximum flow, Qmax =
⇒ Qmax = 2600 vph
17.  Match List-I (Speed) with List-II (Application) and select the correct answer using the code given below the lists:
List-I
- Space mean speed
- Journey speed
- Running speed
- Spot speed
List-II
- Road conditions studies
- Regulatory measures
- Traffic flow studies
- Delay studies
[IES 2007]
-  1  4  3 2
-  3 4  1  2
-  1  2  3 4
-  3 2  1  4
Explanation:
18.  Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
- Traffic volume
- Traffic density
- Traffic regulations
- Rotary intersection
List-II
- Number of vehicles occupying a unit length of road at a given instant of time.
- Number of vehicles passing a given point on the road in a given unit of time in a given direction.Â
- Where all converging vehicles are forced to move in one direction around a large central traffic island.
- Rules covering all aspects of control of vehicles, drivers and all other road users.
[IES 2008]
Codes: A B C D
-  3  1  4  2
-  2  1  4  3
-  3  4  1  2
-  2  4  1  3
Explanation:
- Traffic volume is defined as the number of vehicles crossing a section of the road per unit time at any selected period.
- Traffic density is the number of vehicles occupying a unit length of a roadway at a given instant.
- Traffic regulations cover all the aspects of control of vehicles, drivers and all other road users.
- Rotary intersection is an enlarged road intersection where all the converging vehicles are forced to move around a large central island in one direction before they weave out of traffic flow into their respective directions.
19.  In urban transportation planning, the ‘Modal Split’ is the process of which one of the following ?
[IES 2008]
- Staggering of working hours
- Segregation of fast and slow modes
- Separation of traffic streams by flyovers
- Deciding the choice for a mode
Explanation:
Modal split is the representation of the percentage of travellers using a particular mode of transport compared to the ratio of all trips made.
20. Which set of traffic studies is needed for functional design as well as for ‘highway capacity’ design ?
[IES 2009]
- Parking and accident studies
- Speed and volume studies
- Axle load studies
- Origins and destination studies
Explanation:
- Spot speed study and traffic volume study are required for planning traffic control, geometric re-designing of existing highways, deciding the design speed for new highways, studying traffic capacity, etc.,
- Traffic volume study is used in analysis of traffic trends and patterns, design of intersections, planning of signal timings, etc.,
- Speed and delay studies are helpful in the spots of congestion, travel time, etc.,