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# 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 weaving

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

increases

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

1.0

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