1. What is the primary purpose of the Alabama Department of
Transportation (ALDOT)?
A) Issue driver’s licenses
B) Maintain and improve state highways and bridges
C) Collect federal taxes
D) Oversee local police operations
Answer: B
Explanation: ALDOT is responsible for planning, construction, and
maintenance of Alabama’s state highway system and bridges, not licensing or
law enforcement.
2. Which federal act primarily governs funding for Alabama highway
construction projects?
A) Federal Highway Act
B) Clean Water Act
C) Federal-Aid Highway Act
D) Safe Roads Initiative
Answer: C
Explanation: The Federal-Aid Highway Act provides funding for interstate
and state highways, including Alabama’s system.
3. What is the minimum design speed typically required for interstate
highways in Alabama rural areas?
A) 45 mph
B) 50 mph
,C) 60 mph
D) 70 mph
Answer: D
Explanation: Rural interstates in Alabama are generally designed for speeds up
to 70 mph to ensure safety and traffic efficiency.
4. In Alabama, which material is most commonly used for highway base
courses?
A) Sand only
B) Crushed stone or gravel
C) Asphalt millings
D) Concrete slabs
Answer: B
Explanation: Crushed stone or gravel is commonly used in Alabama for
stability and drainage in base courses.
5. What is the typical lane width for Alabama state highways?
A) 9 feet
B) 10 feet
C) 11–12 feet
D) 14 feet
Answer: C
Explanation: Standard highway lanes in Alabama measure 11–12 feet wide to
accommodate modern vehicles safely.
6. What is the purpose of a crown in a roadway cross-section?
A) Aesthetic appeal
B) Drainage of water off the pavement
C) Reducing vehicle speed
D) Increasing pavement thickness
,Answer: B
Explanation: The crown (slight slope in the center) helps water run off to
prevent pooling and extend pavement life.
7. What is the main binder in asphalt concrete used in Alabama highways?
A) Cement
B) Bitumen
C) Lime
D) Epoxy resin
Answer: B
Explanation: Asphalt concrete uses bitumen as a binder for aggregates.
8. According to ALDOT specifications, compaction of subgrade should
achieve at least what percentage of maximum dry density?
A) 85%
B) 90%
C) 95%
D) 100%
Answer: C
Explanation: Subgrade is typically compacted to at least 95% of maximum
dry density to ensure strength and stability.
9. What is the primary function of geotextiles in Alabama highway
construction?
A) Decoration
B) Soil stabilization and separation
C) Reducing noise
D) Increasing pavement color
Answer: B
Explanation: Geotextiles are used for soil separation, reinforcement, and
drainage control.
, 10. Which type of bridge foundation is commonly used in Alabama’s river
crossings?
A) Floating foundation
B) Shallow spread footing
C) Deep pile foundation
D) Wooden crib
Answer: C
Explanation: Deep pile foundations are typically used for stability in soft soils
near rivers.
11. In Alabama, what is the maximum legal weight per axle for standard
trucks on highways (without special permits)?
A) 20,000 lbs
B) 22,500 lbs
C) 34,000 lbs
D) 40,000 lbs
Answer: A
Explanation: The federal standard (also applied in Alabama) limits weight to
20,000 lbs per single axle.
12. What is the primary cause of rutting in asphalt pavements?
A) Poor color
B) Vehicle exhaust
C) Inadequate compaction or heavy traffic loads
D) Rainfall only
Answer: C
Explanation: Rutting occurs from repeated traffic loads and poor compaction.
13. Which safety device is most commonly installed at Alabama
construction work zones?
A) Fences
B) Traffic cones and barrels
Transportation (ALDOT)?
A) Issue driver’s licenses
B) Maintain and improve state highways and bridges
C) Collect federal taxes
D) Oversee local police operations
Answer: B
Explanation: ALDOT is responsible for planning, construction, and
maintenance of Alabama’s state highway system and bridges, not licensing or
law enforcement.
2. Which federal act primarily governs funding for Alabama highway
construction projects?
A) Federal Highway Act
B) Clean Water Act
C) Federal-Aid Highway Act
D) Safe Roads Initiative
Answer: C
Explanation: The Federal-Aid Highway Act provides funding for interstate
and state highways, including Alabama’s system.
3. What is the minimum design speed typically required for interstate
highways in Alabama rural areas?
A) 45 mph
B) 50 mph
,C) 60 mph
D) 70 mph
Answer: D
Explanation: Rural interstates in Alabama are generally designed for speeds up
to 70 mph to ensure safety and traffic efficiency.
4. In Alabama, which material is most commonly used for highway base
courses?
A) Sand only
B) Crushed stone or gravel
C) Asphalt millings
D) Concrete slabs
Answer: B
Explanation: Crushed stone or gravel is commonly used in Alabama for
stability and drainage in base courses.
5. What is the typical lane width for Alabama state highways?
A) 9 feet
B) 10 feet
C) 11–12 feet
D) 14 feet
Answer: C
Explanation: Standard highway lanes in Alabama measure 11–12 feet wide to
accommodate modern vehicles safely.
6. What is the purpose of a crown in a roadway cross-section?
A) Aesthetic appeal
B) Drainage of water off the pavement
C) Reducing vehicle speed
D) Increasing pavement thickness
,Answer: B
Explanation: The crown (slight slope in the center) helps water run off to
prevent pooling and extend pavement life.
7. What is the main binder in asphalt concrete used in Alabama highways?
A) Cement
B) Bitumen
C) Lime
D) Epoxy resin
Answer: B
Explanation: Asphalt concrete uses bitumen as a binder for aggregates.
8. According to ALDOT specifications, compaction of subgrade should
achieve at least what percentage of maximum dry density?
A) 85%
B) 90%
C) 95%
D) 100%
Answer: C
Explanation: Subgrade is typically compacted to at least 95% of maximum
dry density to ensure strength and stability.
9. What is the primary function of geotextiles in Alabama highway
construction?
A) Decoration
B) Soil stabilization and separation
C) Reducing noise
D) Increasing pavement color
Answer: B
Explanation: Geotextiles are used for soil separation, reinforcement, and
drainage control.
, 10. Which type of bridge foundation is commonly used in Alabama’s river
crossings?
A) Floating foundation
B) Shallow spread footing
C) Deep pile foundation
D) Wooden crib
Answer: C
Explanation: Deep pile foundations are typically used for stability in soft soils
near rivers.
11. In Alabama, what is the maximum legal weight per axle for standard
trucks on highways (without special permits)?
A) 20,000 lbs
B) 22,500 lbs
C) 34,000 lbs
D) 40,000 lbs
Answer: A
Explanation: The federal standard (also applied in Alabama) limits weight to
20,000 lbs per single axle.
12. What is the primary cause of rutting in asphalt pavements?
A) Poor color
B) Vehicle exhaust
C) Inadequate compaction or heavy traffic loads
D) Rainfall only
Answer: C
Explanation: Rutting occurs from repeated traffic loads and poor compaction.
13. Which safety device is most commonly installed at Alabama
construction work zones?
A) Fences
B) Traffic cones and barrels
