Highway Engineering (41-60)

Updated: Apr 9, 2020

41. If the design speed is V kmph and deviation angle is N radians, then the total

length of a valley curve in metres is given by the expression


42. If an ascepding gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of summit curve for a stopping sight distance of 80 m will be 60 m


43. Highway facilities are designed for thirtieth highest hourly volume


44. Enoscope is used to find spot speed


45. For highway geometric design purposes the speed used is 98th percentile


46 Traffic capacity should always be more than traffic volume


47. Length of a vehicle affects extra width of pavement and minimum turning radius


48. The maximum width of a vehicle as recommended by IRC is 2.44 m


49. Desire lines are plotted in origin and destination studies


50. Which of the following methods is preferred for collecting origin and destination data for a small area like a mass business centre or a large intersection? license plate method


51.The traffic manoeuvre shown in Fig. 4.1 represents



52. The diagram which shows the approximate path of vehicles and pedestrians

involved in accidents is known as collision diagram


53. With increase in speed of the traffic stream, the minimum spacing of vehicles



54. Traffic volume is equal to traffic density x traffic speed


55. Which of the following is known as design capacity ? practical capacity


56. If the average centre to centre spacing of vehicles is 20 metres, then the basic

capacity of a traffic lane at a speed of 50 kmph is 2500 vehicles per hour


57. With increase in speed of the traffic stream, the maximum capacity of the lane

first increases and then decreases after reaching a maximum value at optimum speed


58. Equivalent factor of passenger car unit (PCU) for a passenger car as per IRC is



59. If the stopping distance and average length of a vehicle are 18 m and 6 m

respectively, then the theoretical maximum capacity of a traffic lane at a speed

of 10 m/sec is 1500 vehicles per hour


60.Scientific planning of transportation system and mass transit facilities in cities

should be based on origin and destination data

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