Highway Construction & Maintenance
One Lane Road Ahead sign
The road ahead narrows to a single lane shared by traffic in both directions.
- Shape
- Diamond
- Color
- Orange with black
- Type
- Highway Construction & Maintenance
What to do
- Slow down and be ready to yield or stop for oncoming vehicles or for a flagger controlling who moves through.
How to read it
Diamond. A diamond is a warning. It tells you about a hazard or a change in the road ahead.
Orange with black. Orange is used in and around work zones.
Highway Construction & Maintenance. Work zone signs warn of construction or maintenance. Fines are often higher in work zones.
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.
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