NCDOT Traffic Engineering & Control

Question 1

According to NCDOT standards, what is the minimum sight distance required at a stop-controlled intersection on a road with a posted speed of 45 mph?

Accepted Answer

415 feet

Answer

NCDOT follows AASHTO guidelines requiring approximately 415 feet of stopping sight distance for a 45 mph posted speed at stop-controlled intersections.

Question 2

Which MUTCD-compliant sign color is used for NCDOT guide signs on the state highway system?

Accepted Answer

Green with white legend

Answer

MUTCD specifies green with white legend for highway guide signs indicating destinations and distances on state highway systems.

Question 3

What is the standard minimum lateral clearance from the edge of travel lane to a fixed roadside object on a primary North Carolina highway?

Accepted Answer

6 feet

Answer

NCDOT design standards require a minimum 6-foot lateral clearance from the edge of the travel lane to fixed objects on primary highways.

Question 4

Under NCDOT traffic signal timing guidelines, what term describes the total time for a traffic signal to complete one full cycle through all phases?

Accepted Answer

Cycle length

Answer

Cycle length is the total time, in seconds, for a traffic signal to complete one full sequence of all signal phases.

Question 5

Which traffic study does NCDOT primarily require to determine if a traffic signal is warranted at an unsignalized intersection?

Accepted Answer

MUTCD warrant analysis

Answer

NCDOT requires a MUTCD warrant analysis using the eight warrants defined in the Manual on Uniform Traffic Control Devices to justify signal installation.

NCDOT - North Carolina Department of Transportation Practice Test

NCDOT - North Carolina Department of Transportation Practice Test

NCDOT Traffic Engineering & Control