ADVANCE LANE ASSIGNMENT SIGN Sign Requirements

1. When a ADVANCE LANE ASSIGNMENT SIGN Sign Is Used

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.

• 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

2. How and Where It Applies

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.

3. Placement and Application Notes

Position G20-1(CA) at the decision point, junction, or service location the sign serves, per CA MUTCD Part 2 and Caltrans placement standards.

• Place the sign where drivers have a clear, unobstructed view on approach.
• Mount at the standard height and setback from the edge of the traveled way.
• Do not mount with other signs on the same post unless space constraints require it.

4. Standard Sizes and Visibility Considerations

Typical minimum: 48" × 24".

• Choose size based on roadway speed, sight distance, and mounting location.
• Maintain high retroreflectivity for maximum night and adverse-weather visibility.

5. California 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).

6. Common Field or Planning Mistakes

• 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.