Highway Engineering

Updated: Jul 23, 2020

1 Nagpur road plan formulae were prepared by assuming-radial or star and grid road pattern.


2 Second 20-year plan has provided 1600 km of expressways out of the

proposed National highway.


3 sequence of four stages of survey in a highway alignment is-map study, reconnaissance, preliminary survey and detailed survey.


4 The shape of the camber, best suited for cement concrete pavements, is-straight line.


5 For water bound macadam roads in localities of heavy rainfall, the recommended value of camber is-1 in 36.


6 The stopping sight distance depends upon-total reaction time of driver,speed of vehicle,efficiency of brakes.


7 When the path travelled along the road surface is more than the circumferential

movement of the wheels due to rotation, then it results in-skidding.


8 Coefficient of friction is less when the pavement surface is-smooth and wet.


9 The shoulder provided along the road edge should be-rougher than the traffic lanes.


10 Camber in the road is provided for-effective drainage.


11 Compared to a level surface, on a descending gradient the stopping sight distance is-more.


12 On a single lane road with two way traffic, the minimum stopping sight

distance is equal to-two times the stopping distance.


13 The desirable length of overtaking zone as per IRC recommendation is equal to-five times the overtaking sight distance.


14 Stopping sight distance is always-less than overtaking sight distance.


15 Reaction time of a driver-decreases with increase in speed.


16 If the stopping distance is 60 metres, then the minimum stopping sight distance for two lane, two way traffic is-60 m.


17 The effect of grade on safe overtaking sight distance is-to increase it on both descending and ascending grades.


18 The ruling design speed on a National Highway in plain terrain as per IRC

recommendations is-100 kmph.


19 The terrain may be classified as rolling terrain if the cross slope of land is-between 10% and 25%.


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


21 Traffic volume is equal to-traffic density x traffic speed.


22 On a right angled road intersection with two way traffic, the total number of conflict points is-24.


23 The background colour of the informatory sign board is-yellow.


24 warning sign-level crossing.


25 "Dead Slow" is a-regulatory sign.


26 Centre line markings are used-in roadways meant for two way traffic.


27 Maximum number of vehicles can be parked with-90° angle parking.


28 tests measures the toughness of road aggregates -impact test.


29 Los Angeles testing machine is used to conduct-abrasion test.


30 The maximum allowable Los Angeles abrasion value for high quality surface

course is-30%.


31 The ductility value of bitumen for suitability in road construction should not be

less than-50cm.


32 The maximum limit of water absorption for aggregate suitable for road construction is-0.6%.


33 Penetration test on bitumen is used for determining its-grade.


34 Bitumen of grade 80/100 means-its penetration value is 8 to 10 mm.


35 Softening point of bitumen to be used for road construction at a place where maximum temperature is 40° C should be-greater than 40°C 36 For rapid curing cutbacks, the oil used is-gasoline.


37 The method of design of flexible pavement as recommended by IRC is-CBR method.


38 Bottom most layer of pavement is known as-subgrade.


39 Tie bars in cement concrete pavements are at-longitudinal joints.


40 The maximum spacing of contraction joints in rigid pavements is-4.5m.


41 The maximum thickness of expansion joint in rigid pavements is-25mm.


42 The camber of shoulders in water bound macadam roads is-equal to the cross slope of pavement.


43 In highway construction, rolling starts from-sides and proceed to centre.


44 In the penetration macadam construction, the bitumen is-sprayed after the aggregates are spread and compacted.


45 The suitable surfacing material for a bridge deck slab is-mastic asphalt.


46 The thickness of bituminous carpet varies from-20 to 25 mm.


47 In highway construction on superelevated curves, the rolling shall proceed from-lower edge towards the upper edge.


48 Expansion joints in cement concrete pavements are provided at an interval of-18 m to 21 m


49 Dowel bars are provided in longitudinal joints 50 The camber for hill roads in case of bituminous surfacing is adopted as-2.5%.


51 The minimum design speed for hairpin bends in hill roads is taken as-20 kmph


52 The drain which is provided parallel to roadway to intercept and divert the water from hill slopes is known as-catchwater drain


53 The walls which are necessary on the hill side of roadway where earth has to be

retained from slipping is known as-breast wall.


54 In hill roads the side drains arc provided-only on the hill side of road.

1 view0 comments

Recent Posts

See All