Guide Signs
Carpool Lane Entrance sign
The white HOV diamond over the words "CARPOOL LANE ENTRANCE" marks where a high-occupancy-vehicle lane begins.
- Shape
- Horizontal rectangle
- Color
- Green with white
- Type
- Guide
What to do
- Only vehicles carrying the posted number of occupants may enter, so check your passenger count before merging in.
How to read it
Horizontal rectangle. Wider than it is tall. This shape is mostly used for guidance and information, and for some rules.
Green with white. Green gives directions, distances and permitted movements.
Guide sign. Guide signs give directions, distances and services. They do not state a rule.
Signs follow the national standard (the MUTCD) in every state. Your state handbook is the final word for your test.
Related signs
Signs that look similar or come up together on the test.
Road signs quiz and flashcards
Drill every sign on your phone, along with the rest of your state’s test.
Not a government website. USA DMV (usadmv.app) is an independent study resource. It is not affiliated with, endorsed by or operated by any state DMV, the Texas Department of Public Safety or any other government agency. Practice questions are written to reflect official driver handbooks but are not the official test questions. Always confirm current requirements with your state’s licensing agency.