Interstate Route Shield
guide sign · rectangle v · blue
Identifies an Interstate highway route number.
- Visual breakdown
- Red, white, and blue shield: red band on top, route number in white on a blue field.
- Shape recognition
- The shield silhouette is unique to Interstates — like a badge for the highway.
- Color recognition
- Red-white-blue = national Interstate system; guide signs in general are green or blue.
- Memory trick
- Even numbers run east–west (E for Even/East-west doesn't work — remember 'even keeled across'), odd numbers run north–south.
- Real-world example
- I-95 (odd) runs north–south along the East Coast; I-10 (even) runs east–west across the South.
- Common mistakes
- Confusing route shields with speed limits when glancing quickly — shields have no 'SPEED LIMIT' text.
- Quick recall method
- Badge shape = Interstate; even across, odd up-down.
