Highway Engineering Practice Exam 2026
Questions for Professional Mastery
1. What is the desirable minimum radius of a horizontal curve on a
highway with a design speed of 80 km/h and a superelevation of
6%?
A) 150 m
B) 180 m
C) 200 m
D) 220 m
_Rationale: The minimum radius is determined using the formula
R=V2127(e+f)R = \frac{V^2}{127(e+f)}R=127(e+f)V2, which yields
200 m for the given speed and superelevation._
2. Which of the following pavement types is best suited for heavy
traffic with high axle loads?
A) Gravel
B) Rigid (Concrete) Pavement
C) Bituminous Flexible Pavement
D) Earthen Road
_Rationale: Rigid pavements can sustain heavy loads due to their
high modulus of elasticity and distribute loads over a wide area._
3. The main purpose of providing camber in road pavement is to:
A) Increase friction
B) Facilitate drainage
C) Reduce tire wear
D) Enhance aesthetics
, _Rationale: Camber allows water to drain from the surface,
preventing water accumulation and reducing hydroplaning risk._
4. The stopping sight distance (SSD) depends on:
A) Vehicle weight only
B) Perception-reaction time and braking distance
C) Pavement type only
D) Lane width
_Rationale: SSD is calculated as the sum of the distance traveled
during the driver’s perception-reaction time and the braking
distance._
5. In the flexible pavement design, the standard axle used is:
A) 5-tonne
B) 10-tonne
C) 8.2-tonne single axle
D) 12-tonne
_Rationale: The 8.2-tonne single axle is a standard in flexible
pavement design as per AASHTO recommendations._
6. Which material is commonly used for subgrade stabilization?
A) Sand only
B) Lime or Cement
C) Asphalt
D) Aggregate
_Rationale: Lime or cement improves the bearing capacity of
weak subgrades by altering the soil properties._
7. The main function of a highway shoulder is:
A) Increase pavement life
B) Provide safe refuge for stopped vehicles
, C) Reduce noise
D) Improve aesthetics
_Rationale: Shoulders serve as emergency stopping areas,
providing safety to vehicles that break down or stop._
8. The method commonly used to measure traffic volume is:
A) Radar survey
B) Questionnaire
C) Manual or automatic traffic counting
D) GPS tracking only
_Rationale: Traffic volume is measured using manual counts,
pneumatic tubes, or automatic counters on highways._
9. In vertical curves, the length of crest curves is influenced by:
A) Lane width
B) Pavement type
C) Design speed and stopping sight distance
D) Shoulder width
_Rationale: The length of vertical curves ensures safe stopping
sight distance for vehicles at design speed._
10. The pavement roughness is quantified using:
A) Skid resistance
B) Camber
C) International Roughness Index (IRI)
D) Superelevation
_Rationale: IRI measures ride quality and pavement smoothness,
expressed in m/km or in/mi._
11. Which type of intersection is considered safest in terms of
collision points?
Questions for Professional Mastery
1. What is the desirable minimum radius of a horizontal curve on a
highway with a design speed of 80 km/h and a superelevation of
6%?
A) 150 m
B) 180 m
C) 200 m
D) 220 m
_Rationale: The minimum radius is determined using the formula
R=V2127(e+f)R = \frac{V^2}{127(e+f)}R=127(e+f)V2, which yields
200 m for the given speed and superelevation._
2. Which of the following pavement types is best suited for heavy
traffic with high axle loads?
A) Gravel
B) Rigid (Concrete) Pavement
C) Bituminous Flexible Pavement
D) Earthen Road
_Rationale: Rigid pavements can sustain heavy loads due to their
high modulus of elasticity and distribute loads over a wide area._
3. The main purpose of providing camber in road pavement is to:
A) Increase friction
B) Facilitate drainage
C) Reduce tire wear
D) Enhance aesthetics
, _Rationale: Camber allows water to drain from the surface,
preventing water accumulation and reducing hydroplaning risk._
4. The stopping sight distance (SSD) depends on:
A) Vehicle weight only
B) Perception-reaction time and braking distance
C) Pavement type only
D) Lane width
_Rationale: SSD is calculated as the sum of the distance traveled
during the driver’s perception-reaction time and the braking
distance._
5. In the flexible pavement design, the standard axle used is:
A) 5-tonne
B) 10-tonne
C) 8.2-tonne single axle
D) 12-tonne
_Rationale: The 8.2-tonne single axle is a standard in flexible
pavement design as per AASHTO recommendations._
6. Which material is commonly used for subgrade stabilization?
A) Sand only
B) Lime or Cement
C) Asphalt
D) Aggregate
_Rationale: Lime or cement improves the bearing capacity of
weak subgrades by altering the soil properties._
7. The main function of a highway shoulder is:
A) Increase pavement life
B) Provide safe refuge for stopped vehicles
, C) Reduce noise
D) Improve aesthetics
_Rationale: Shoulders serve as emergency stopping areas,
providing safety to vehicles that break down or stop._
8. The method commonly used to measure traffic volume is:
A) Radar survey
B) Questionnaire
C) Manual or automatic traffic counting
D) GPS tracking only
_Rationale: Traffic volume is measured using manual counts,
pneumatic tubes, or automatic counters on highways._
9. In vertical curves, the length of crest curves is influenced by:
A) Lane width
B) Pavement type
C) Design speed and stopping sight distance
D) Shoulder width
_Rationale: The length of vertical curves ensures safe stopping
sight distance for vehicles at design speed._
10. The pavement roughness is quantified using:
A) Skid resistance
B) Camber
C) International Roughness Index (IRI)
D) Superelevation
_Rationale: IRI measures ride quality and pavement smoothness,
expressed in m/km or in/mi._
11. Which type of intersection is considered safest in terms of
collision points?
