Lane Control Signal X and Diamond Configuration for Reversible Lanes
Introduction
A lane control signal tells drivers whether a lane is open, closed or about to close. Used on reversible lanes, toll plaza lanes and bridge/tunnel lanes, lane control signals prevent wrong-way driving and improve throughput. This guide covers the standard X and diamond configurations.
The Three Indications
A lane control signal uses three indications:
- Red X: lane is closed. Drivers must vacate the lane.
- Yellow X: lane is about to close. Drivers should vacate or complete their manoeuvre.
- Green arrow (downward): lane is open. Drivers may use the lane.
GAOQIAO lane control signals are typically 200mm or 300mm diameter and mounted at the driver's eye level (2.5-3.0 m). The X and arrow are made from individual LEDs or LED segments, not lenses.
Reversible Lane Configuration
A reversible lane needs lane control signals over each lane at each decision point: before the lane starts, before any access point, and at the end of the lane. The signals operate as a coordinated group, all showing red X or all showing green arrow.
GAOQIAO supplies lane control signal arrays with a single controller driving the whole group, eliminating the risk of mismatched indications between signals.
Toll and Bridge Applications
For toll plazas and bridge/tunnel lanes, lane control signals often include a fourth indication:
- Yellow diamond: lane is open but restricted (e.g., HOV only, or limited to certain payment methods).
The diamond is a square shape with the same colour conventions as the X: red diamond means closed, yellow diamond means restricted, green diamond means fully open (no restriction).
Featured Products
GAOQIAO supplies lane control signals and toll lane signals. See the traffic signal size selection guide for sizing.
Conclusion
Lane control signals prevent wrong-way driving and improve throughput on reversible, toll and bridge lanes. GAOQIAO supplies coordinated arrays with single-controller group operation. Send us your lane layout and we will return a signal array plan.
Get a Quote
Email: sky-sale@njgq.net WhatsApp/Phone: +86-18805173545 Tel: +86-25-84471080
Frequently Asked Questions
What diameter lane control signal should I use?
200mm for low-speed applications (parking gates, low-speed reversible lanes); 300mm for highway reversible lanes, toll plazas and bridge approaches.
Can a lane control signal be solar powered?
Yes, paired with a solar wireless controller. GAOQIAO's solar line covers remote reversible lane applications.
Do I need a permit to install lane control signals?
Yes. Lane control signals are MUTCD-controlled devices and require authority approval before installation. GAOQIAO can help with the documentation.
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 with MUTCD, EN12368, GB14886 compliance.
- Signal polesVertical, signal arm and double-arm poles for any intersection geometry.
- Spare parts and accessoriesSpare LED modules, lenses, visors, surge arrestors and anchor bolts.