Introduction
A lane-control signal communicates the permitted use of a lane, such as open, closed or a transition where the approved scheme provides for one. Reversible lanes, toll lanes and bridge or tunnel approaches may use these systems. Confirm the required red-cross, arrow or other indication, its meaning and the controller interlocks from the applicable approved design.
Required indications
Check which indications the selected lane control signal supports and which are required by the approved traffic plan:
The meaning of a diamond symbol depends on the applicable traffic-control system and local rules. Specify the approved symbol, colour and operating meaning for the project. Do not infer lane-open, lane-restricted or lane-closed status from a diamond colour without the governing specification.
- Red X: the lane is not available for travel in the indicated direction; follow the applicable road rules and instructions.
- Green downward arrow: the lane may be used in the indicated direction, subject to applicable restrictions and other traffic-control instructions.
- Yellow X: use only where the local rules permit this indication and its meaning is approved for the site.
Reversible Lane Configuration
A reversible lane requires an authority-approved lane-control design covering every relevant entry and decision point. Coordinate indications for each travel direction and provide the required interlocking and clearance sequence so that opposing traffic is not simultaneously permitted into the same lane. Signal positions, display states and operating procedures must follow the applicable rules and the approved project design.
For a lane-control signal group, define the approved indication logic, controller outputs, interlocks and behaviour after faults. Ask GAOQIAO to confirm the available control arrangement for the selected products. A shared controller does not by itself eliminate the risk of inconsistent indications; verify the complete system against the project requirements.
Frequently Asked Questions
Select lane-control display size from the approved visibility, lane geometry and mounting requirements for the parking, reversible-lane, toll or bridge application. Do not assign 200mm or 300mm solely from the application name.
A solar wireless controller may be considered for a reversible-lane system only after the indication logic, communications, fault response and authority requirements have been verified. Ask GAOQIAO to confirm compatibility and available equipment for the specific project; a solar power source alone does not establish suitability.
Confirm the road authority’s requirements before installing lane-control signals. US projects should review the applicable MUTCD provisions; other jurisdictions may use different rules. Agree the approval and documentation scope for the selected installation and confirm any supplier assistance with GAOQIAO.
Conclusion
Lane-control signals communicate permitted lane use on reversible, toll and bridge facilities as part of an approved traffic-management design. Their effectiveness depends on visibility, placement, coordination and driver compliance. Send GAOQIAO the lane layout and control requirements to confirm suitable products and the scope of any design or integration support.
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Relevant GAOQIAO products
These public GAOQIAO catalogue pages are related to the guide. Open them for the representative description, then confirm the latest drawing and configuration before ordering.
- Traffic signal controllersWired and solar controllers with 6, 22, 44 and 56 output options.
- LED traffic signal heads200mm, 300mm and 400mm signal heads; confirm the selected model and applicable project requirements.
- Signal polesVertical, signal arm and double-arm poles; confirm suitability for the approved site design.
- Spare parts and accessoriesSpare LED modules, lenses, visors, surge arrestors and anchor bolts.