G20-1(CA) Advance Lane Assignment Sign
The G20-1(CA) Advance Lane Assignment sign is a California guide sign that tells drivers, in advance of a junction or lane drop, which lane serves a given destination — a named destination shown above a lane legend such as RIGHT LANE or LEFT LANE. It is a green guide sign with white legend, shown here with its California MUTCD Sign Chart face. It is a distinct sign from the federal G20-1 'Road Work Next XX Miles' construction sign that shares the number.
- Sign Name
- Advance Lane Assignment Sign
- General Meaning
- The G20-1(CA) Advance Lane Assignment sign is a California guide sign that tells drivers, in advance of a junction or lane drop, which lane serves a given destination — a named destination shown above a lane legend such as RIGHT LANE or LEFT LANE.
- MUTCD Code
- G20-1(CA)
- Typical Use
- At the decision point, junction, or service location the sign serves, per CA MUTCD Part 2 and Caltrans placement standards.
- Sign Category
- Guide & Destination Signs
Specifications
- Standard Shape
- Rectangle (Horizontal)
- Background Color
- Green
- Legend / Symbol
- White legend
- Border
- White
- Reflectivity
- High Intensity (for nighttime visibility)
- Compliance
- MUTCD / CA MUTCD
Standard Sizes (inches)
- Conventional Rectangle (Horizontal)24"–48" tall
- Expressway Rectangle (Horizontal)36"–60" tall
- Freeway Rectangle (Horizontal)48"–72" tall
Material / Application Notes
Advance destination-to-lane assignment ahead of a junction or lane drop. Confirm placement and supplemental plaques against the applicable CA MUTCD standard.
View this sign on the CA MUTCD (Caltrans)California Notes
California-specific application notes and adoptions may differ. Review California requirements where applicable.
What It Means / When This Sign Is Used
In the field, G20-1(CA) Advance Lane Assignment Sign is typically positioned at the beginning of the work zone (advance/upstream). Common deployments include advance destination-to-lane assignment ahead of a junction or lane drop; selected and sized for the roadway type and approach speed; coordinated with the overall guide-signing plan. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
Learn more about Advance Lane Assignment Sign sign requirementsWhen & Where It's Used
- Advance destination-to-lane assignment ahead of a junction or lane drop
- Selected and sized for the roadway type and approach speed
- Coordinated with the overall guide-signing plan
Placement on a Traffic Control Plan
- Where it sits
- At the decision point, junction, or service location the sign serves, per CA MUTCD Part 2 and Caltrans placement standards.
- CA MUTCD reference
- CA MUTCD Part 2, Chapters 2D–2K (Guide and Motorist Services Signs)
- Typical minimum size
- 48" × 24"
California / Field Use Notes
Used in California on approaches to interchanges, lane drops, and major junctions to assign a destination to a specific lane ahead of the decision point, per the CA MUTCD and the Caltrans Sign Specification for G20-1(CA).
In Los Angeles, this sign must conform to the CA MUTCD. Work in City of LA right-of-way is reviewed by StreetsLA and the Bureau of Engineering; state highways in LA County are permitted by Caltrans District 7; county roads by LA County DPW.
Common Plan Review Comments
- Confirm the destination legend and lane assignment match the junction.
- Verify size for the roadway classification and approach speed.
- Confirm retroreflective sheeting class per the CA MUTCD.
- Verify placement and mounting height per the CA MUTCD.
Confirm the destination legend and lane assignment match the junction geometry, and that size and placement follow the CA MUTCD. Public Ready can review sign selection against your plan and agency requirements.
Related Signs
View All G-Series Signs
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.
Need to Rent or Purchase This Sign? Contact Public Ready.
Public Ready supports sign selection, project-ready sign packages, and equipment sourcing through qualified providers — with expert support built for compliance.