Interstate 66 Highway Sign - Official U.S. Route Marker #1982223 (License: Personal Use)

This image shows the standardized U.S. Interstate highway shield for Route 66, featuring a red upper band with “INTERSTATE” in white uppercase letters, and a blue lower field with large white numerals “66”. The design follows Federal Highway Administration (FHWA) specifications for national consistency and high visibility. It is commonly seen along I-66, which runs from Strasburg, Virginia, to Washington, D.C.

Used on transportation websites, government DOT pages, travel guides, and mapping resources to identify or illustrate Interstate 66. Matches user intent for route identification, trip planning, or understanding U.S. highway signage systems.