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Seventh Semester B.E. Degree Examination, Dea.20lt5lJan"2016
llighway Geometric Design Time: 3 hrs.
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Calculate the setback distance on a national highway having horizontal curve of radius 300 m and length 180 m. Assume speed as 80 kmph and coefficient of frictior as 0.35.
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Derive the expression for super elevation on a horizontal curve. {08 Marks) Calculate the extra widening required on a single lane one way road havirig a horizontal curve of radius 80m, with a wheel base of 6.1 m. ({t4 Mariks)
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considered in highway Geonretric Design. {08 Nfarks) Exptrain FIEV theory with a neat sketch. (04 Marks) The design speed on a two way traffic road is 75 kmph. The rate of acceleration of the fbst movillg vehicle is 0.95 m/sec2/sec. The difference in speed between c,vertakjng anctr overtaken vehicles is 25 krnph. Calculate (i) Safe OSD (ii) Mention the miniirrum and desirable length of OTZ (iii) Draw the overtaking zone. (08 Marks)
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What is sight distance? Explain briefly the three important sight diste.nce situations
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Explain at least two objectives providing (i) Camber ...(ii)-Medians (iii) Right of way (iii) Kerbs. (oB r\{arks) Draw the typical cross section of the following with relevaret dirnensions: i) Two lane city road in Built up area. ii) Divided highway in urban area. {08 Marks) In a road test f,or measuring skid resistance, using skid resistance equipnrent, the timer indicating 5 seconds of brake application and the braking distance indicatecl by the colour spray was measured as 35.0 m before the vehicle was brought to stop. What is the average resistance of the pavement surface? (04 liarks)
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Also list the various specifications for each as per IRC standards" (trO &{anks) Expiain the various objects of highway geometric design. List the various geometrie eiements to be considered in the highway geometric design. {10 Mart
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PART * A Write a note on (i) Design speed (ii) Design vehicle.
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Note: 1. Answer any FIVE full questions, selecting wtleast TWO qwestioms frotn each part" 2" Assuyne uruy missing data switably as per IRC sisndards.
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PART _ B Ditferentiate between Summit curve and valley curve. (04 Marks) Derive an equation for length of valley curve for (1) Comfort condition (ii) Headlight sight distance when i) L > SSD , ii) L < SSD, (0t{ N{arks) A sumrnit curve is to be designed for a speed of 80 kmptrr, when two grades +1 in 50 and -1 in 40 rneets on a curve such that SSD and OSD of 150 m and 600 m respectiveiy. Due to site conditions, the length of summii curye is restricted to less than 500 m. FirLd the length of sumrnii curve to fuIflll both the safepassing sight distance and safe stopping sight distance requirements. {08 Marks)
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on : (i) Gap in medians at junctions (ii) Channelizinglsland. (10 Marks) Briefly explain the channehzed. and unchannelized intersections, their advantages and
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D,raw aneat (i) Diamond interchange (ii) Half clover leaf and explain any TWO advantages of each. (10 Marks)
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(06 Marks) Explain the importance of highway drainage. (08 Marks) Explain the design procedure of filter material used in subsurface drain. A longitudinal channel with a trapezoidal cross section is to be constructed in a cut section. The longitudinal-slope is 1 in 25A0, soil is clay with Manning\ coefficient as 0.024. Take
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movillg vehicle is 0.95 m/sec2/sec. ... vehicle. Also list the various specifications for each as per IRC standards" (trO &{anks) ... List the various geometrie ... (i) Diamond interchange (ii) Half clover leaf and explain any TWO advantages of each.
b) Design the length of transition curve for a two lane highway in plain terrain, with. a design speed of 100 kmph and redius of 260 m. Assume any other data.
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What are the modified classifications of Road system by Third RDP (1981. - 2001)?. 23. ... Explain the role of GIS and GPS in highways. 7. Define MORTH. ... What is off tracking? 18.Define super ... vehicle is 0.99m/sec2. Calculate SSD, OSD ...
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This piece of legislation has had a great impact on the highway safety .... campaigns such as Click It or Ticket and Drive Sober or Get Pulled Over, and also ..... U-3) Percent of Utah Motor Vehicle Crash Occupant Fatalities Ages 10-19 That were ...
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