Transportation Engineering: Roadway
Design, Traffic Flow, and Signal Timing
Exam 2026 Questions and Answers
Graded A+
A high-speed arterial directly connects to a large shopping center driveway with no
intermediate roadway type. According to AASHTO functional classification
principles, what
is the primary concern with this design? - Correct answer-Compromised safety and
mobility due to violation of movement hierarchy
According to AASHTO, which roadway type carries the highest level of traffic
movement in
the functional classification hierarchy? - Correct answer-Arterials
When designing an acceleration lane, a truck is used instead of a passenger car as
the
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, controlling design vehicle. Which factor most directly justifies this decision? -
Correct answer-Trucks have lower acceleration capability, resulting in longer
required lane lengths
Which statement about the degree of curve (D) is correct under the arc definition
used by
AASHTO? - Correct answer-Degree of curve is the angle subtended by a 100-ft arc
Which combination of factors directly governs the minimum safe radius of a
horizontal curve? - Correct answer-Design speed, side friction, and superelevation
If a horizontal curve is designed with excessive superelevation, which outcome is
most likely? - Correct answer-Low-speed vehicles will tend to drift inward
Sight distance on horizontal curves is most commonly restricted by: - Correct
answer-Obstructions on the inside of the curve
If calculations show that available stopping sight distance (SSD) on a horizontal
curve is
inadequate, which option is generally considered the least desirable? - Correct
answer-Ignoring the deficiency if crash history is low
A simple circular curve has PI = 8+00, R = 600 ft, and Δ = 41°. What is the station
of PC (nearest foot)? - Correct answer-5+76
©COPYRIGHT 2025,ALL RIGHTS RESERVED 2
Design, Traffic Flow, and Signal Timing
Exam 2026 Questions and Answers
Graded A+
A high-speed arterial directly connects to a large shopping center driveway with no
intermediate roadway type. According to AASHTO functional classification
principles, what
is the primary concern with this design? - Correct answer-Compromised safety and
mobility due to violation of movement hierarchy
According to AASHTO, which roadway type carries the highest level of traffic
movement in
the functional classification hierarchy? - Correct answer-Arterials
When designing an acceleration lane, a truck is used instead of a passenger car as
the
©COPYRIGHT 2025,ALL RIGHTS RESERVED 1
, controlling design vehicle. Which factor most directly justifies this decision? -
Correct answer-Trucks have lower acceleration capability, resulting in longer
required lane lengths
Which statement about the degree of curve (D) is correct under the arc definition
used by
AASHTO? - Correct answer-Degree of curve is the angle subtended by a 100-ft arc
Which combination of factors directly governs the minimum safe radius of a
horizontal curve? - Correct answer-Design speed, side friction, and superelevation
If a horizontal curve is designed with excessive superelevation, which outcome is
most likely? - Correct answer-Low-speed vehicles will tend to drift inward
Sight distance on horizontal curves is most commonly restricted by: - Correct
answer-Obstructions on the inside of the curve
If calculations show that available stopping sight distance (SSD) on a horizontal
curve is
inadequate, which option is generally considered the least desirable? - Correct
answer-Ignoring the deficiency if crash history is low
A simple circular curve has PI = 8+00, R = 600 ft, and Δ = 41°. What is the station
of PC (nearest foot)? - Correct answer-5+76
©COPYRIGHT 2025,ALL RIGHTS RESERVED 2
