DHANALAKSHMI COLLEGE OF ENGINEERING, CHENNAI DEPARTMENT OF CIVIL ENGINEERING QUESTION BANK Title of the Paper: Traffic Engineering and management Subject code: CE6006 UNIT I
INTRODUCTION PART – B
1.
Explain the various vehicular characteristics which affect the road design and traffic performance.
2.
A passenger car weighing 2 tonnes is required to accelerate at a rate of 3 m/sec2 in the first gear from a speed of 11 km/hr. The gradient is +1% and the road has a black topped surface. The frontal projection area of the car is 2.15 m2. The car tyres have radius of 0.33 m. The rear axle gear ratio is 3.82:1 and the first gear ratio is 2.78:1. Calculate the engine horsepower needed and the speed of the engine. Make suitable assumptions.
3.
Write in short the significance and scope of traffic engineering.
4.
Explain rolling and air resistance.
5.
Explain the factors affecting road user characteristics.
UNIT II
TRAFFIC SURVEYS AND ANALYSIS PART – B
1.
Enumerate the different methods of carrying out traffic volume studies.
2.
Explain in detail various origin destination surveys.
3.
Write briefly the different factors causing accidents.
4.
Explain moving observer method.
5.
Explain the factors affecting capacity and level of service.
UNIT III
TRAFFIC CONTROL PART – B
1.
Explain the various types of traffic signals and their functions. How are the signal timings decided?
2.
Explain in detail, the various types of road markings commonly usedwith neat sketches.
3.
A fixed type 2 – phase signal is to be provided at an intersection having a North – South and an East – West road, where only straight ahead traffic is permitted. The design hour flows from the various arms and the saturation flows for these arms are given in the following table.
4.
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Details of flow Design hour flow (PCU/hour) Saturation flow (PCU/hour)
5.
North
South
East
West
810
380
770
950
2500
1900
2800
3100
Design the traffic signal with timing diagram and phase diagram. Assume relevant data. Write the various advantages and disadvantages of different types of signals.
6.
(a) List out the advantages of traffic signals. (b) What is meant by saturation flow? (c) State the need for signal co-ordination.
7.
The average normal flow of traffic on cross roads A and B during design period are 400 PCU per hour and 250 PCU per hour respectively, the saturation flow values on these roads are estimated as 1250 PCU per hour and 1000 PCU per hour respectively. The all – red time required for pedestrian crossing is 12 sec. Design two phase traffic signal with sketch by Webster’s method.
UNIT IV
GEOMETRIC DESIGN OF INTERSECTION
1.
PART – B Explain in detail, the channelization of intersection and its purposes with neat sketches.
2.
Explain the advantages and the disadvantages of rotary intersection.
3.
What are the advantages and disadvantages of grade separated intersections?
4.
Explain in detail, the various design elements of rotary type of intersection based on IRC standards with neat sketches.
5.
What is an intersection? Explain in detail, the two broad classifications of intersections.
UNIT V
1.
TRAFFIC MANAGEMENT
PART – B Write short notes on few of the traffic management measures: a) Tidal flow operation b) Exclusive bus lane c) Restriction on turning movement d) Traffic calming
2.
Write briefly on the following: a) Locations where parking is prohibited b) Peripheral parking schemes c) Speed breakers d) Rumble strips
3.
Explain the applications of ITS in traffic management.
4.
What is the significance of traffic management? Write the various travel demand management techniques commonly used in managing traffic on roads.
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The frontal projection area of the car is 2.15 m2 . The car tyres have radius of 0.33 m. The. rear axle gear ratio is 3.82:1 and the first gear ratio is 2.78:1. Calculate the engine. horsepower needed and the speed of the engine. Make suitable assump
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