Warns drivers that bicyclists may merge into or share the travel lane ahead, prompting added caution where a bike facility is interrupted.
Work zones that close or interrupt a bike lane. Confirm placement and supplemental plaques against the applicable CA MUTCD standard.
View this sign on the Federal MUTCD (FHWA)California-specific application notes and adoptions may differ. Review California requirements where applicable.
Warns drivers that bicyclists may merge into or share the travel lane ahead, prompting added caution where a bike facility is interrupted.
Warns drivers that bicyclists may merge into or share the travel lane ahead, prompting added caution where a bike facility is interrupted. In the field, W9-5a Bicycles Merging is typically positioned at the advance warning area, ahead of the work. Common deployments include work zones that close or interrupt a bike lane; locations where cyclists merge into the travel lane; used with bicycle detour / accommodation signing. 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 Bicycles Merging sign requirementsUsed where a work zone closes or interrupts a bike lane and cyclists must merge into the travel lane, as part of the temporary bicycle accommodation on a California TCP.
In Los Angeles, this sign must conform to CA MUTCD 2026. Work in City of LA right-of-way is reviewed by StreetsLA and the Bureau of Engineering (BOE); state highways in LA County are permitted and reviewed by Caltrans District 7; county roads are permitted by LA County DPW. Sizes, retroreflectivity, and placement must meet CA MUTCD minimums — local agencies may require larger signs based on roadway class, speed, pedestrian volume, and proximity to schools or transit.
Confirm the temporary bicycle accommodation is complete and the merge point is safe. Public Ready reviews bicycle handling in the TCP.
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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