RS-138 BABY CHANGING STATION (WOMEN'S ROOM) Standard Sizes
This page shows the common MUTCD standard sizes for the RS-138 BABY CHANGING STATION (WOMEN'S ROOM) 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.
RS-138 BABY CHANGING STATION (WOMEN'S ROOM) Sign Standard Size Chart
- 24 in24" × 24"
- Typical Use
- Low-speed local roads and shared-use paths
- Notes
- Common minimum for symbol and recreational signs.
- 30 in30" × 30"
- Typical Use
- Conventional roadways
- Notes
- Typical size for most installations.
- 36 in36" × 36"
- Typical Use
- Higher-speed or higher-volume roadways
- Notes
- Improved legibility and daytime/nighttime visibility.
- 48 in48" × 48"
- Typical Use
- Expressways and freeways
- Notes
- Larger size for high-speed facilities.
RS-138 BABY CHANGING STATION (WOMEN'S ROOM) Sign Dimensions
H (Height)For a square, Width (W) and Height (H) follow the nominal size at each dimension.
When Each Size Is Typically Used
- 24 in SquareLow-speed local roads and shared-use paths
- 30 in SquareConventional roadways
- 36 in SquareHigher-speed or higher-volume roadways
- 48 in SquareExpressways and 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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