1) Two platoons of cars are timed over a distance of 0.5 km. Their flows arerecorded. The first group is timed at 40 seconds, with the flow at 1350 vehiclesper hour. The second group take 45 seconds, with a flow of 1800vehicles perhour. Determine the maximum flow of the traffic stream. a) 2269 veh/hr b) 2269 veh/hr. 2) A suburban undivided 4-lane highway on rolling terrain has a peak hourvolume (V) in one direction of 1500 vehicles per hour, with a peak hour factorestimated at 0.85. All lanes are 3.05m (10ft) wide.There are no obstructionswithin 1.83m (6ft) of the kerb.The percentages for the various heavy vehicle types are:PT– 12%PB– 6%PR– 2%Determine the level of service of this section of highway. a) Highway operates at Level of Service E b) Highway operates at Level of Service E. 3) A 2-lane highway has lane widths of 9ft (2.75m),with 6ft (1.83m) clear hardshoulders. There are no-passing zones along 40% of its length.The directionalsplit is 70/30 in favour of the peak direction.The percentages for thevarious heavy vehicle types are:PT– 10%PB–4%PR– 2%The terrain is rolling. Calculate the service flow of the highway when runningat full capacity. a) 1145 veh/hr b) 1145 veh/hr. 4) Determine the level of service provided by a 2-lane highway with a peakhour volume (V) of 1200 and a peak-hour factor of 0.8. No passing is permittedon the highway. The directional split is 60/40 in favour of the peak direction.Both lanes are 12ft (3.65m) wide. There is a 1.22m (4ft) clearance on bothhard shoulders.The percentages for the various heavy vehicle types are:PT– 10%PB– 4%PR– 2% The terrain is level. a) Level of service E b) Level of service E. 5) A divided rural multi-lane highway is required to cope with an AADT of40000 vehicles per day.A 70 mph design speed is chosen with lanes a standard 3.65 m wide and thereare no obstructions within 1.83 m of any travelled edge. The traffic is assumedto be composed entirely of private cars and the driver population is ideal.The peak hour factor is 0.9 and the directional factor, D, is estimated at 0.6.The highway is required to maintain level of service C. It is to be designed tocope with the thirtieth highest hourly volume during the year.Calculate the required physical extent of the highway, i.e. the number of lanesrequired in each direction. a) Three lanes are required in each direction b) Three lanes are required in each direction. 6) An approach has an effective green time of 65 seconds and an optimumcycle time of 100 seconds. The actual flow on the approach is 1000 vehiclesper hour, with its saturation flow estimated at 1750 vehicles per hour. Calculatethe average delay per vehicle using both the precise and approximateformulae. a) 23 sec b) 23 sec. 7) The value of the camber recommended for cement concrete roads in areasof heavy rainfall is a) 1 in 25 b) 1 in 40 c) 1 in 33 d) 1 in 50 8) The reaction time for calculation of stopping distance may be assumed as a) 5 s b) 0.5 s c) 2.5 s d) 10.0 s 9) Transition curves are provided on the approach to horizontal curves inorder to a) increase jerk to allowable levels b) minimize the length of the horizontal curve c) simplify the laying out and construction of the horizontal curve d) reduce jerk to allowable levels 10) On sag (or valley) curves the available sight distance is determined basedon a) design speed b) height of obstacle c) height of driver eye d) night time driving conditions 11) Maximum allowable grades are lower for railways than for highwaysbecause a) construction costs become prohibitive for railways at high grades b) trains are longer than vehicles which use the highways c) high grades causes discomfort to passengers d) steel wheels on steel rails have lower frictional coefficient than rubber tyreson pavements 12) Sliding considerations for stopped vehicles on super elevated horizontalcurves provide the following bound on the amount of super elevation, e,A. e ≥ coefficient of rolling friction a) e ≥ coefficient of rolling friction b) e ≥ coefficient of side friction c) e ≤ coefficient of rolling friction d) e ≤ coefficient of side friction 13) At highway stretches where the required overtaking sight distance cannotbe provided, it is necessary to incorporate a) at least twice the stopping sight distance b) half the required overtaking sight distance c) one third the required overtaking sight distance d) three times thestopping sight distance 14) The ideal form of curve for the summit curve is a) spiral b) circle c) parabola d) emniscates 15) Transition curve is provided in horizontal alignment a) to increase the radius of curvature b) to facilitate the application of superelevation c) to counteract the centrifugal force developed d) to prevent vehicle from skidding laterally 16) The important factor considered in the design of summit curves onhighways is a) comfort to passenger b) sight distance c) superelevation d) impact factor 17) On a circular curve, the rate of superelevation is e. While negotiating thecurve a vehicle comes to a stop. It is seen that the stopped vehicle does notslide inwards (in the radial direction). The coefficient of side friction is f. Whichof the following is true: a) e ≤ f b) f < e < 2f c) e ≥ 2f d) None of the above 18) A road is being designed for a speed of 110 km/hr on a horizontal curvewith a super elevation of 8%. If the coefficient of side friction is 0.10, theminimum radius of the curve (in m) required for safe vehicular movement is a) 115.0 b) 264.3 c) 152.3 d) 528.5 19) The following data are related to a horizontal curved portion of a two-lanehighway: length of curve = 200 m, radius of curve = 300 m and width ofpavement 7.5 m. In order to provide a stopping sight distance (SSD) of 80 m,the set back distance (in m) required from the centre line of the inner lane ofthe pavement is a) 2.54 b) 7.10 c) 4.55 d) 7.96 20) If v is the initial speed of a vehicle, g is the gravitational acceleration, G isthe upward longitudinal slope of the road and fr s the coefficient of rollingfriction during braking, the braking distance (measured horizontally) for thevehicle to stop is a) b) c) d) 21) Consider the following statements in the context of geometric design ofroads.I. A simple parabolic curve is an acceptable shape for summit curvesII. Comfort to passengers is an important consideration in the design of summitcurvesThe correct option evaluating the above statements and their relationship is a) I is true, II is false b) I is true, II is true, and II is the correct reason for I c) I is true, II is true, and II is NOT the correct reason for I d) I is false, II is true 22) The design speed for a two-lane road is 80 kmph. When a design vehiclewith a wheelbase of 6.6 m is negotiating a horizontal curve on that road, theoff-tracking is measured as0.096 m. The required widening of carriageway ofthe two-lane road on the curve is approximately a) 0.55 m b) 0.75 m c) 0.65 m d) 0.85 m 23) A crest vertical curve joins two gradients of + 3 % and-2 % for a designspeed of 80 km/h and the corresponding stopping sight distance of 120 m. Theheight of the driver's eye and the object above the road surface are 1.20 mand 0.15 m respectively. Thecurve length (which is less than stopping sightdistance) to be provided is a) 120 m b) 163 m c) 152 m d) 240 m 24) A road is provided with a horizontal circular curve having deflection angleof 55° and centre line radius of 250 m. A transition curve is to be provided ateach end of the circular curve of such a length that the rate of gain of radialacceleration is 0.3m/s^3 at a speed of 50 km per hour. Length of the transitioncurve required at each of the ends is a) 2.57 m b) 33.33 m c) 35.73 m d) 1666.67 m 25) The extra widening required for a two-lane national highway at a horizontalcurve of 300 m radius, considering a wheel base of 8 m and a design speedof 100 kmph is a) 0.42 m b) 0.62 m c) 0.82 m d) 0.92 m 26) The design speed on a road is 60 kmph. Assuming the driver reaction timeof 2.5 seconds and coefficient of friction of pavement surface as 0.35, therequired stopping distance for two-way traffic on a single lane road is a) 82.1 m b) 102.4 m c) 164.2 m d) 186.4 m 27) A vehicle moving at 60 kmph on an ascending gradient of a highway hasto come to stop position to avoid collision with a stationary object. The ratio oflag to brake distance is 6:5. Considering total reaction time of the driver as 2.5seconds and the coefficient of longitudinal friction as 0.36, the value ofascending gradient (%) is a) 3.3 b) 4.8 c) 5.3 d) 6.8 28) At a horizontal curve portion of a 4 lane undivided carriageway, a transitioncurve is to be introduced to attain required superelevation. The design speedis 60 kmph and radius of the curve is 245 m. Assume length of wheelbase ofa longest vehicle as 6 m, superelevation rate as 5% and rate of introduction ofthis superelevation as 1 in 150. The length of the transition curve (m) required,if the pavement is rotated about inner edge is. a) 81.4 b) 85.0 c) 91.5 d) 110.2 29) The length of summit curve on a two lane two way highway depends upon a) allowable rate of change of centrifugal acceleration b) coefficient of lateral friction c) required stopping sight distance d) required overtaking sight distance 30) A road is having a horizontal curve of 400 m radius on which a superelevation of 0.07 is provided. The coefficient of lateral friction mobilized on thecurve when a vehicle is travelling at 100 kmph is a) 0.07 b) 0.13 c) 0.15 d) 0.40 31) For a road with camber of 3% and the design speed of 80 km/h, theminimum radius of the curve, beyond which no superelevation is needed, is a) 1680 m b) 948 m c) 406 m d) 280 m 32) A traffic stream in a particular direction of a two lane road is moving with aconstant speed of 50 kmph, with an average headway of 2.52 seconds. Thelongitudinal distance between two consecutive vehicles is a) 30 m b) 35 m c) 38 m d) 42 m 33) Stopping sight distance and frictional coefficients are a) directly proportional to each other b) inversely proportional to each other c) unrelated d) either directly or inversely proportional to each other depending on thenature of pavement. 34) The design value of lateral friction coefficient on highway is a) 1.50 b) 0.35 c) 0.50 d) 0.15 35) Camber on highway pavement is provided to takecare of a) Centrifugal Force b) Drainage c) Sight Distance d) Off-Tracking 36) Stopping sight distance is the minimum distance available on a highwaywhich is the a) distance of sufficient length to stop the vehicle without collision. b) distance visible to a driver during night driving c) height of the object above the road surface. d) distance equal to the height of the driver’s eye above the road surface 37) The relationship between the length (I) and radius (r) of an ideal transitioncurve is given by a) b) c) d) 38) At highway stretches where the required overtaking sight distance cannotbe y provided, it is necessary to incorporate in such sections the following a) at least twice the stopping sight distance b) half of the required overtaking sight distance c) one third of the required overtaking sight distance d) three times the stopping sight distance 39) If an ascending gradient of 1 in 50 meets another ascending gradient of 1in 30 then thedeviation angle is. a) 1 in 50 b) 1 in 75 c) 1 in 30 d) 1 in 150 40) Bitumen is derived from a) destructive distillation of coal tar b) destructive distillation of petroleum c) fractional distillation of petroleum d) naturally occurring ores 41) Bituminous materials are commonly used in highway construction becauseof their good a) tensile and compression properties b) binding and waterproofing properties c) shear strength and tensile properties d) bond and tensile properties 42) Rapid curing cutback bitumen is produced by blending bitumen with a) Kerosene b) Benzene c) Diesel d) Petrol 43) The penetration test for bitumen is conducted at a temperature of a) 60°C b) 37°C  c) 25°C d) 50°C 44) Bituminous materials are used in highway construction primarily becauseof their a) cementing and waterproofing properties b) load bearing capacity c) high specific gravity d) black colour which facilitates road markings 45) The result of ring and ball softening point test on asphalts is given in terms a) viscosity b) time c) flow d) temperature 46) Road roughness is measured using a) Benkelman beam b) Bump integrator c) Dynamic cone penetrometer d) Falling weightdeflectometer 47) Mud pumping is commonly associated with a) bituminous penetration macadam construction b) cement concrete pavement on granular subgrade c) premixed bituminous construction d) cement concrete pavement on clay subgrade 48) The following generalstatement may be made about the penetration valueand softening point of bitumen a) higher the penetration value, higher is the softening point b) higher the penetration value, lower is the softening point c) for very high and very low penetration value, the softening point is very low d) absolutely no correlation can be drawn between penetration value andsoftening point of bitumen 49) The temperature to be maintained for the determination of the penetrationvalue if bitumen is a) 15° C b) 25° C c) 40° C d) 60° C 50) Alligator or map cracking is the common type of failure in a) concrete pavements b) bituminous surfacing c) gravel roads d) WBM construction 51) One of the probable causes of rutting on flexible pavements is a) excessive stripping of binder material from the wearing course b) use of flaky aggregates in the wearing course c) inadequate compaction of pavement layers d) high wind speeds 52) An important purpose of prime coasts is to a) promote the bond between the base and the wearing courses b) promote the adhesion between an existing wearing surface and asubsequent wearing surface c) promote the bond between the subbase course and the subgrade d) increases the stability of the subgrade 53) For laying bituminous carpet over water bound macadam road surface,one hasto apply a a) tack coat b) seal coat c) bitumen grout d) slurry coat 54) In highway pavements emulsions are mainly used in a) surface dressing b) patching and maintenance c) bitumen macadam d) asphaltic concrete

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