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

335 feet

Answer

500 feet

Answer

280 feet

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

Blue with white legend

Answer

Brown with white legend

Answer

White with black legend

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

2 feet

Answer

10 feet

Answer

14 feet

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

Phase interval

Answer

Offset period

Answer

Split duration

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

Level of service analysis

Answer

Peak hour factor study

Answer

Gap acceptance study

Question 6

What is the purpose of a left-turn overlap phase in NCDOT signal design?

Accepted Answer

Provides additional green time to a left-turn movement concurrent with a non-conflicting phase

Answer

Allows left turns during the opposing through green

Answer

Extends pedestrian crossing time at an intersection

Answer

Reduces cycle length by eliminating separate left-turn phases

Question 7

According to NCDOT standards, pavement markings that delineate the edge of the roadway on the right side are typically what color?

Accepted Answer

White

Answer

Yellow

Answer

Blue

Answer

Red