This guide summarizes the MUTCD requirements and practical application guidance for the G20-1(CA) LENGTH OF WORK sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.
Applied per the CA MUTCD and Caltrans sign specifications
Beginning of the work zone (advance/upstream).
Mount at the standard height and setback for the roadway with clear sight lines.
High reflectivity and clear sight lines are essential day and night.
The G20-1(CA) Length Of Work is a California MUTCD guide sign, shown here with its official full-color face from the California MUTCD Sign Chart. Refer to the CA MUTCD and Caltrans sign specifications for its official meaning, dimensions, and placement.
The G20-1(CA) Length Of Work is a California MUTCD guide sign, shown here with its official full-color face from the California MUTCD Sign Chart. Refer to the CA MUTCD and Caltrans sign specifications for its official meaning, dimensions, and placement. In the field, G20-1(CA) Length of Work is typically positioned at the beginning of the work zone (advance/upstream). Common deployments include applied per the CA MUTCD and Caltrans sign specifications; selected and sized for the roadway type and setting; coordinated with the overall signing plan and permit. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
Beginning of the work zone (advance/upstream).
Typical minimum: 48" × 24".
G20-1(CA) is used in California per the CA MUTCD. Confirm its application, size, retroreflective sheeting, and placement against the CA MUTCD and the reviewing agency.
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