Single point interchange — North Carolina Permit Test

Single point interchange on the North Carolina permit test — 1 rule, each with the reason behind it and a question on it while it is fresh.

The rules

A single-point interchange compresses two intersections into one, over or under a free-flowing road, with through traffic and left-turning traffic controlled by a single set of signals at the center or top of the interchange.

One set of signals clears the crossing faster than two. It moves a lot of traffic through a small space.

A single-point interchange compresses two intersections into a single intersection over or under a free-flowing road.

North Carolina Driver Handbook, p.57

On the test

What is a single-point interchange?

Two crossings squeezed into one, run by one set of signals. One set of signals clears the crossing faster than two. It moves a lot of traffic through a small space. North Carolina Driver Handbook, p.57: “A single-point interchange compresses two intersections into a single intersection over or under a free-flowing road.”

How this works

Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.

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Where these come from

Every rule here is checked against North Carolina Driver Handbook, published by the North Carolina Division of Motor Vehicles, and against the state code itself. Last checked 2026-10-03.