Route 21 Highway Sign - Official Roadway Marker #3064561 (License: Personal Use)

This is a standardized road sign featuring the number “21” in large, white, sans-serif numerals centered on a vivid blue background, enclosed by a thin white border and outer black frame. Designed for high visibility and regulatory compliance, it follows international traffic sign conventions used across many countries for numbered routes or motorways. The clean contrast ensures legibility at speed and in varied lighting conditions.

Used on highways, interstates, or regional roads to identify Route 21; appears in driver education materials, GIS mapping, transportation databases, and municipal signage documentation-matching user intent for navigation, route planning, or regulatory reference.