III B.Tech II Semester Examinations,December-January, 2011-2012 TRANSPORTATION ENGINEERING Civil Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. With the help of a neat diagram indicating the various geometric elements of a traffic rotary, explain about the design elements of a rotary intersection. [16]
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2. What are the functions to be served by the sleepers in a railway track? Discuss the merits and demerits of different types of sleepers and give suitable sketches wherever needed. [16]
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3. What are Road Marking? What is the need for road markings. What are the types of road marking. Discuss. [16]
4. What are the objects of providing transition curves on the horizontal alignment highways? Explain. what are the different types of transition curves used in highways? [16]
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5. The length of a runway under standard conditions is 1640 m. The airport site has an elevation of 280 m and its reference temperature is 33.50 C. if the runway is to be constructed with an effective gradient of 0.20 percent, determine the corrected runway length. [16] 6. Explain the term traffic volume. What are the objects of carrying out traffic volume studies? Enumerate the different methods of carrying out traffic volume studies. Indicate the principle of each. [16]
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7. (a) What is the importance of Nagpur road plan in highway planning of our country. Explain the plan formulae and the salient features of the plan. (b) Discuss the second twenty year road plan of 1961-81 and its salient features. [16]
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8. What are the factors influencing the speed of a train on a given track? Explain. What are the various formulae available for working out safe speed and the maximum speed on different gauges? Discuss. [16] ?????
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III B.Tech II Semester Examinations,December-January, 2011-2012 TRANSPORTATION ENGINEERING Civil Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
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1. What is creep? What are the effects of creep? Discuss the theories propounded to explain probable causes of creep. Discuss anti creeping methods to reduce creep. [16] 2. (a) What is camber & what is its need on pavement. what are factors on which camber is choosen. Give JRC Recommendations.
(b) What is stopping sight distance. What is the need to have SSD and factors on which it is based. [8+8]
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3. (a) Derive an expression for superelevation when a train is negotiating a curve.
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(b) What should be the equilibrium cant on a M.G. track curve for an average speed of 60 kmph. Also find out the permissible speed allowing the maximum cant deficiency. [8+8] 4. What is a wind rose diagram? Explain how a wind rose diagram is to be prepared assuming some hypothetical wind data. [16] 5. What are the various methods of classifying roads ? Briefly outline the classification based on location and function as suggested in the Nagpur Road Plan. [16] 6. Write short notes on the following:
(a) Entry and Exit Radius at rotary.
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(b) Weaving section of a rotary. (c) Capacity of a rotary.
(d) Radius of Rotary Island.
[16]
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7. Discuss the various traffic studies and their importance.
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8. Design the timings of an isolated signal to be installed at a right angled intersection when roads P and Q cross. The data available are: Road P Road Q Width, metre 14.0 10.5 [16] Peak hour traffic volume, vehicles Per hour per lane 200 120 Approach speed, kmph 50 35 ?????
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III B.Tech II Semester Examinations,December-January, 2011-2012 TRANSPORTATION ENGINEERING Civil Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) Write short notes on the following: i. Negative Superelevation. ii. Cant Deficiency.
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1. (a) Discuss about the types of gradients adopted in geometric design of a railway track.
[8+8]
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2. Indicate how the traffic volume data is collected (mechanical) and presented and how the results are used in traffic engineering. [16]
3. Give a neat sketch of a typical cross section of a permanent way of a BG track on an embankment and indicate the components. Also discuss about the requirements of an ideal permanent way. [16]
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4. What are the advantages and disadvantages of traffic signals? Explain the various types of traffic signals and their functions. [16] 5. (a) Explain briefly the modified classification of road system in India as per the Third Twenty Year Road Development Plan, 1981-2001. (b) Briefly outline the main features of various road patterns commonly in use. Explain. Write about the historical development of roads in India? [8+8]
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6. An airport is proposed at a location which is 486 m above MSL. The basic runway length is computed as 2460 m. The local meteorological observatory has recorded the following information: (a) Monthly average of the maximum daily temperature of the hottest month of the year= 46.30 C.
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(b) Monthly average of the daily temperature of the hottest month of the year= 30.20 C.
It is proposed to limit the effective gradient of the runway to 0.75
7. (a) Explain with the help of neat sketches how traffic islands and channelization can be effectively used for protection of crossing pedestrians at intersections and also vehicles intending to turn from main road to side road at intersections. (b) Discuss design factors of rotary.
[8+8]
8. Explain summit and valley curves and the various cases when these are formed while two different gradients meet. [16] 3
Code No: 07A60106
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III B.Tech II Semester Examinations,December-January, 2011-2012 TRANSPORTATION ENGINEERING Civil Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. What are the various types of at-grade intersections possible? Describe the same with suitable sketches showing their lay out. [16]
[16]
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2. Describe the types of crossings with the help of neat sketches.
3. (a) Explain the necessity of sleepers in railway track. What are the desirable qualities of good sleepers?
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(b) Compare the relative merits and demerits of wooden and concrete sleepers. [8+8] 4. Mention different types of signals? How are the signal timings decided?
[16]
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5. What are the various objects and applications of spot-speed studies? What is the difference between time mean speed and space mean speed. How are the studies carried out. [16] 6. Enumerate the various design factors controlling the vertical alignment of highways. [16] 7. The length of a runway under standard conditions is 1800m.The airport is to be provided at an elevation of 110m above the mean sea-level. The airport reference temperature is 220 C. The construction plan includes the following data. Grade(Percent)
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End to End of Runway (w)
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0 to 300 +1.00 300 to 900 -0.25 900 to 1500 +0.50 1500 to 1800 +1.00 1800 to 2100 -0.30 Determine the actual length of runway to be provided. Apply corrections for elevation and temperature as per ICAO and for gradients as per FAA specifications.
8. Write short notes on : (a) Central road fund (b) Nagpur road plan (c) Indian Roads Congress 5
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Discuss the principle of measuring the hardness of Heat Affected Zone using Jominey · hardenability test? .... (b) What is post weld heat treatment? Describe the ...
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