Interstate Route Marker
Category
Guide & Service
Shape
Shield
Color
Red, white, and blue
This shield marks a numbered interstate highway. Use it to confirm you are traveling on the correct freeway. The number identifies the specific route you are following.
Common test question
On the DMV permit test you may be shown this sign and asked “What does this sign mean?” The answer is Interstate Route Marker. Recognize it by its shield shape and red, white, and blue colors — a hallmark of guide & service signs.
Practice with the Road Signs Quiz →