GAOQIAO is a Chinese traffic light controller manufacturer with 17+ years of experience designing and exporting signal controllers for permanent intersections, mobile traffic systems and solar-powered off-grid intersections. Our controller line covers the full range of B2B use cases: cabinet-mounted wired controllers with conflict monitoring for permanent urban intersections, wireless remote controllers for manual override, and solar wireless controllers that integrate solar charge control with traffic signal logic in a single weatherproof enclosure. Every controller is compatible with standard signal heads worldwide and ships with full wiring diagrams and timing plan configuration software.
| Family | Use case | Power source | Sub-catalog |
|---|---|---|---|
| Wired cabinet controller | Permanent urban intersections, 4-32 phases | Mains (110-220 VAC) | Normal Wire Controller |
| Wireless remote controller | Manual override, portable use, traffic police | Battery | Traffic Light Remote |
| Solar wireless controller | Off-grid intersections, temporary deployment | Solar + battery | Solar Wireless Controller |
The wired cabinet controller is the workhorse of permanent intersection control. It mounts in a roadside cabinet (Type P332, Type 336 or M-style depending on the regional standard) and provides power distribution, signal head switching, conflict monitoring and optional coordination with an upstream master or central system.
The wireless remote controller is a portable handheld unit that communicates with the cabinet controller (or directly with the signal heads in a fully wireless installation) to manually override the current phase. Common use cases include traffic police directing traffic at a malfunctioning intersection, roadwork crews temporarily redirecting flow, and event organizers managing crowd movement.
The solar wireless controller integrates MPPT solar charge control, battery management, wireless signal head control and conflict monitoring in a single weatherproof enclosure. It is designed for off-grid intersections where running power cable is impractical or cost-prohibitive.
Wired cabinet controllers in NEMA P332 or P336 cabinets are the standard configuration for 4-way urban intersections. They support coordination with adjacent intersections along a corridor, allowing green-wave timing plans during peak hours.
For roadwork zones, event sites and emergency traffic management, the wireless remote controller paired with portable mobile traffic lights allows operators to direct flow without permanent infrastructure. See our mobile solar traffic light line for fully integrated portable systems.
Solar wireless controllers are the standard for rural intersections where grid power is unavailable or unreliable. Combined with solar warning lights, they provide a complete off-grid intersection solution. Browse the solar wireless controller sub-catalog for typical configurations.
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GAOQIAO manufactures three controller families: (1) Wired cabinet controllers for permanent intersections with grid power, supporting 4 to 32 phases, conflict monitoring and coordination with upstream master systems. (2) Wireless remote controllers for manual override at the cabinet or from a vehicle. (3) Solar wireless controllers for off-grid intersections, integrating solar charge control, battery management and wireless signal head control in a single weatherproof enclosure.
Standard cabinet controllers support 4 to 32 phases, with 8 phases being the most common for typical 4-way intersections. Each phase controls one signal head or signal group. The controller supports ring-and-barrier, lead-lag and free-operation timing plans, with cycle length, split and offset adjustable per coordination plan.
Yes. Every GAOQIAO cabinet controller includes a Conflict Monitor Unit (CMU) that monitors for incompatible signal indications (e.g., green-green conflicts) and forces the intersection to flash within 0.5 seconds of detection. The CMU is field-programmable and meets NEMA TS 2 and ATC 5.2b standards for conflict monitoring.
Standard protocols include RS-232, RS-485, Ethernet and optional 4G/GSM modem. For coordination with a central traffic management system, the controller supports NTCIP, UTCS and most regional protocols. Custom protocol integration is available for OEM projects.
The standard GAOQIAO traffic light controller supports 8 phases and 32 signal groups, which covers the majority of 3-way and 4-way intersections. The 16-phase / 64-group variant is available for complex multi-approach intersections and roundabouts. Each phase can run in fixed-time, vehicle-actuated, pedestrian-actuated, transit-priority, or adaptive (SCATS/SCOOT-compatible) mode.
Yes. The controller ships with RS-232, RS-485, Ethernet, USB, and optional 4G/5G cellular or fiber modules. Native NTCIP 1202 v2 protocol support is standard, and we provide the MIB files and conformance test report. We also support GB 25280 (Chinese NTCIP equivalent), Modbus TCP, and private protocols used by Swarco, Siemens, Peek and Eagle systems on request.
Timing plans are uploaded through a Windows-based configuration tool over USB, Ethernet or 4G. We support offline plan editing with conflict-detection before download. Plans can also be pushed from a central traffic management system (CTMS) using the same NTCIP 1202 interface. A full backup of the active timing plan is automatically stored on a microSD card inside the cabinet for one-touch restoration after a controller swap.
About GAOQIAO — Nanjing Gaoqiao Traffic Technology Co., Ltd. is a Chinese traffic light controller manufacturer with 17+ years of export experience. For international traffic controller standards guidance, see NEMA standards and the ITE technical resources library.
This section summarizes the most common commercial and technical questions that importers, contractors and government procurement officers ask before issuing a purchase order for traffic light controller systems from GAOQIAO.
GAOQIAO products are designed to meet the most widely adopted international road, traffic and electrical safety standards. Our factory is audited annually by TÜV, SGS and BV.
For tender submissions, GAOQIAO provides pre-filled compliance matrices, type-test reports, photometric files, and CAD drawings within 3 working days of request.
GAOQIAO traffic light controller systems have been deployed in 60+ countries. The following are the most common deployment scenarios our project team encounters.
For each scenario, GAOQIAO can share anonymized case studies with photos, drawings, and measured performance data on request.
With proper preventive maintenance, the operational lifetime of a GAOQIAO traffic light controller typically exceeds 10 years. The following schedule reflects the experience of our field service team across more than 60 countries.
GAOQIAO offers annual maintenance contracts and on-site technician training for distributor networks. Spare-part kits for the first 3 years of operation are bundled with every shipment at no additional cost.
Last updated: 2026-06-29 — This page is reviewed weekly by the GAOQIAO team.
Questions about the latest specs or want a custom quote? Contact our engineering team.