Interstate Route Marker Sign
Identifies the interstate highway you are on or approaching
What to do
Use it to confirm you are on the correct route.
Tips
Even-numbered interstates run east–west; odd-numbered run north–south.
Test yourself
You see this sign while driving. What do you have to do?
Show the answer
Use it to confirm you are on the correct route.
Common mistake
Confusing interstate shields with US route markers
About guide signs
Guide signs are green (directions and distances) or blue (services like gas, food, and hospitals). They don't command an action, but the written test still asks what their colors and symbols mean so you can navigate without hesitation.
Frequently asked questions
What does the Interstate Route Marker Sign mean?
Identifies the interstate highway you are on or approaching
What should you do at a Interstate Route Marker Sign?
Use it to confirm you are on the correct route.
Reference standard: Federal Highway Administration Manual on Uniform Traffic Control Devices ↗. State and local agencies may add rules or operating times, so follow the complete posted sign where you drive. How DMV Prep sources content.
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