Bicycle and Bike Lane Signs

When a work zone affects a bike lane or a roadway used by bicyclists, the traffic control plan has to account for people on bikes — not just motor vehicles and pedestrians. In California, this follows the CA MUTCD 2026 and any local active-transportation requirements, which in Los Angeles can involve LADOT and the City’s mobility plans.

The general principle is the same as for other road users: give advance warning, provide a safe path through or around the work, and return bicyclists to the bike facility past the work area. Depending on the situation, that can mean closing the bike lane and merging bicyclists with traffic, shifting the bike lane, or providing a marked bicycle detour.

Common approaches in a work zone

• Bike lane closed / merge with traffic. Where the bike lane is taken by the work, advance signing tells bicyclists the lane is closed ahead and that they will share the travel lane, with channelizing devices guiding the merge.
• Bike lane shift. Where space allows, the bike lane is shifted around the work with tapers and delineation rather than closed outright.
• Bicycle detour. For larger or longer closures, a signed bicycle detour routes riders along an alternate street and back to the original facility.
• Shared pedestrian/bicycle considerations. Where bicyclists are directed onto a path with pedestrians, the plan must keep that path usable and accessible.

Related signs

Bicycle accommodations in a work zone are usually built from the same warning and lane-closure signs used elsewhere — for example the W20-5 lane-closure series and W20-1 Road Work Ahead, plus detour markers from the detour signs category. Bicycle-specific signs and plaques are added where the CA MUTCD or the local agency calls for them.

For broader work-zone setup guidance — advance warning, channelizing devices, and access — see the Work Zone Compliance Guide.