R3-6L OPTIONAL MOVEMENT LANE CONTROL (LEFT) Standard Sizes
This page shows the common MUTCD standard sizes for the R3-6L OPTIONAL MOVEMENT LANE CONTROL (LEFT) sign. Use this information to select the appropriate size based on roadway speed, traffic conditions, and visibility needs. All dimensions are in inches.
Common Sizes
Standard nominal sizes per MUTCD.
Roadway Applications
Size selection based on speed, ADT, and roadway environment.
Visibility / Reflectivity
High-intensity reflective sheeting required at night.
Mounting Guidance
Proper mounting height and placement for optimal visibility.
R3-6L OPTIONAL MOVEMENT LANE CONTROL (LEFT) Sign Standard Size Chart
- Conventional24"–48" tall
- Typical Use
- City, county, and conventional state roadways
- Notes
- Overall size scales with the message; width is set by the legend length.
- Expressway36"–60" tall
- Typical Use
- Expressways
- Notes
- Larger letter height and border for higher approach speeds.
- Freeway48"–72" tall
- Typical Use
- Freeways
- Notes
- Largest legend for high-speed reading distance.
R3-6L OPTIONAL MOVEMENT LANE CONTROL (LEFT) Sign Dimensions
H (Height)For a rectangle (vertical), Width (W) and Height (H) follow the nominal size at each dimension.
When Each Size Is Typically Used
- Conventional Rectangle (Vertical)City, county, and conventional state roadways
- Expressway Rectangle (Vertical)Expressways
- Freeway Rectangle (Vertical)Freeways
Material / Visibility Notes
- ✓High-Intensity ReflectivitySigns should use high-intensity or diamond-grade retroreflective sheeting for nighttime visibility.
- ✓Sign LegibilityLarger signs improve legibility and driver response time.
- ✓Nighttime VisibilityProper size and reflectivity enhance visibility in low-light conditions.
- ✓MaintenanceKeep signs clean and unobstructed to maintain retroreflective performance.
Educational reference only. This is not an official Caltrans, FHWA, or local agency publication and is not legal or engineering advice. Always verify sign selection, size, placement, spacing, and application against the current CA MUTCD 2026, Caltrans sign specifications, Standard Plans, project documents, and the reviewing agency’s requirements. Local jurisdictions may impose additional requirements, and final selection, placement, and dimensions may require engineering judgment or agency approval. Written against California MUTCD 2026 (effective January 18, 2026) and the Federal MUTCD 11th Edition. Official sources last verified June 2026.
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