Transportation Engineering

Question 1

Q1. The primary objective of transportation engineering is to:
A) Reduce population
B) Provide safe, efficient, economical movement of people and goods
C) Build more roads
D) Promote tourism

Answer 1

B – Core goal = safe & efficient movement of people and goods.

Question 2

Q2. ADT (Average Daily Traffic) is the:
A) Peak 15-minute flow
B) Total vehicles in 24 h / number of days
C) Maximum hourly volume
D) Off-peak count

Answer 2

B – Core goal = safe & efficient movement of people and goods.

Question 3

Q3. PCU (Passenger Car Unit) is used to:
A) Express different vehicles in common units
B) Count only cars
C) Measure fuel
D) Record accidents

Answer 3

A – PCU converts mixed traffic into car equivalents.

Question 4

Q4. Traffic density = ?
A) Flow / Speed B) Flow × Speed C) Vehicles × Length D) Speed / Flow

Answer 4

A – Density = Flow / Speed (per lane).

Question 5

Q5. Spot speed is measured by:
A) Travel-time study B) Radar gun C) License survey D) Volume count

Answer 5

B – Spot speed by radar or speed gun.

Question 6

Q6. Running speed is always:
A) Higher than space-mean speed B) Lower C) Equal D) Unrelated

Answer 6

A – Running speed > space-mean (speed incl. stops).

Question 7

Q7. Design speed is selected based on:
A) Aesthetic value B) Topography and road class C) Contractor bid D) Traffic light timing

Answer 7

B – Depends on terrain and road classification.

Question 8

Q8. Stopping Sight Distance (SSD) formula is
A) ( v^2/(2g) ) B) ( 0.278v t + v^2/(254f) ) C) ( v^2/(127R) ) D) ( 2vt/g )

Answer 8

B – Standard SSD formula (m with v in km/h).

Question 9

Q9. Coefficient of longitudinal friction (f) for highway design ≈
A) 0.10 B) 0.25 C) 0.35 D) 0.45

Answer 9

C (≈ 0.35) – Typical design value for asphalt road.

Question 10

Q10. Super-elevation (e) formula:
A) ( e = v^2/(127R) ) B) ( e = 127R/v^2 ) C) ( e = v/(127R) ) D) ( e = v^2R/127 )

Answer 10

A – e = v² / (127 R).

Question 11

Q11. Transition curve provides:
A) Abrupt entry B) Gradual change from straight to curve C) Shorter length D) None

Answer 11

B – Transition curve gives gradual turning.

Question 12

Q12. Camber on roads is provided for:
A) Drainage B) Comfort C) Aesthetics D) Speed

Answer 12

A – Camber for rainwater drainage.

Question 13

Q13. Ruling gradient on national highway (flat terrain) ≈
A) 1 in 30 B) 1 in 40 C) 1 in 50 D) 1 in 70

Answer 13

C (1 in 50) – Ruling gradient flat terrain.

Question 14

Q14. Traffic volume study is expressed as:
A) Vehicles/day B) Vehicles/hour C) Vehicles/time interval D) All of these

Answer 14

D – Volume may be veh/day or veh/hr etc.

Question 15

Q15. Capacity (C) of road section = ?
A) Speed × Density B) Flow / Time C) Vehicles/hour at max flow D) Average volume

Answer 15

A – ( Q = k v ) = Speed × Density.

Question 16

Q16. Headway is:
A) Time gap between two vehicles B) Spacing of lanes C) Width of vehicle D) Traffic intensity

Answer 16

A – Headway = time between vehicles arrival.

Question 17

Q17. Traffic signal cycle length (Webster’s) ≈
A) ( 1.5L + 5 ) B) ( 1.8L + 10 ) C) ( 1.5L + 10 ) D) ( 1.0L + 5 )

Answer 17

A – Webster ≈ ( 1.5L + 5 ).

Question 18

Q18. LOS (Level of Service) “A” represents:
A) Congested B) Stable flow C) Free flow D) Forced flow

Answer 18

C – LOS A = free flow, no delay.

Question 19

Q19. Weaving section occurs at:
A) Merging and diverging B) Intersections only C) Parking lane D) Toll booth

Answer 19

A – Weaving = merge + diverge zones.

Question 20

Q20. PCU factor for truck ≈
A) 1.0 B) 1.5 C) 2.0 D) 3.0

Answer 20

C (2.0) – Truck ≈ 2 PCU equivalent.

Question 21

Q21. Design life of flexible pavement ≈
A) 5 years B) 10 years C) 15 years D) 20 years

Answer 21

D (20 yrs) – Standard flexible pavement life.

Question 22

Q22. VDF (Vehicle Damage Factor) converts:
A) No. of lanes to equivalent width B) Traffic volume to equivalent axle loads C) PCU to ADT D) Speed to flow

Answer 22

B – VDF translates traffic to axle loads for design.

Question 23

Q23. Pavement failure in flexible type is usually due to:
A) Bond loss B) Fatigue cracking and rutting C) Buckling D) Tensile rupture

Answer 23

B – Fatigue cracks and rutting common.

Question 24

Q24.Rigid pavement failure type mainly
A) Rutting B) Cracking and faulting C) Bleeding D) Corrugation

Answer 24

B – Rigid pavement → cracking & faulting.

Question 25

Q25. Marshall stability test determines: A) Flow only B) Optimum bitumen content and mix stability C) Soil density D) Water content

Answer 25

B – Marshall test → bitumen content and stability.