GAOQIAO is a Chinese 12 inch (300mm) LED traffic light manufacturer with 17+ years of experience producing the industry-standard signal head size for urban and suburban intersections worldwide. The 300mm line is our flagship: it is the most exported size in our catalog, deployed in 60+ countries across the Americas, Europe, the Middle East, Africa and Southeast Asia. Every 300mm signal head is engineered for road-safety applications, certified to CE, RoHS, FCC, IP65, EN 12368 and GB 14887 standards, and supported by GAOQIAO's full vertical integration from LED module production to housing, controller and pole manufacturing. Browse the aspect configurations below or contact our engineering team for project-specific guidance.
The 300mm (12-inch) diameter is the de-facto standard for vehicle traffic signals because it strikes the right balance between viewing distance, hardware cost and structural load:
For a side-by-side comparison of 100mm, 200mm, 300mm and 400-500mm sizes, see the LED traffic light size selection guide.
A single-direction signal head with one LED array. Used for pedestrian signals (walk/don't walk), lane control signals, reversible lane indicators and special-purpose indicators such as ramp meters. Browse 1-aspect products.
Two-direction signal head for compact intersections, ramp control and pedestrian crossings. Browse 2-aspect products.
The industry-standard red/yellow/green vehicle signal used in the majority of urban and suburban intersections. GAOQIAO 3-aspect 300mm is the most exported configuration globally. Browse 3-aspect products.
Red/yellow/green plus a turn arrow (left, right or both). Used at intersections with protected turn phases. The arrow can be a separate aspect or a shared lamp module with arrow overlay. Browse 4-aspect products.
| Parameter | Specification |
|---|---|
| Diameter | 300mm (12-inch) |
| Aspect count | 1, 2, 3 or 4 aspect |
| LED module | High-brightness 5mm LEDs, 50,000+ hour life |
| Countdown timer | Optional, integrated overlay on red or green aspect |
| Housing | Polycarbonate or die-cast aluminum, UV-stabilized, IP65 |
| Lens | Optical-grade UV-resistant polycarbonate with anti-glare hood |
| Voltage | 12-24 VDC or 110-220 VAC |
| Power consumption | 8-12W per aspect |
| Operating temperature | -40°C to +70°C |
| Compliance | CE, RoHS, FCC, IP65, EN 12368, GB 14887 |
| Warranty | 3 years on LED module, 5 years on housing |
3-aspect 300mm at 5-6m mounting height is the standard configuration for 2-lane to 4-lane urban intersections. With signal arm pole support and a matching traffic light controller, the system is the workhorse of municipal traffic management.
2-aspect 300mm (red/green) controls ramp meter flow. Pair with a traffic light remote for manual override during incidents.
3-aspect 300mm with integrated countdown timer and audible alert for pedestrian crossings near schools, hospitals and high-pedestrian areas. The timer overlay displays seconds remaining in the current phase.
2-aspect 300mm (red X / green arrow) above reversible lanes, coordinated with overhead lane control signals. The signals are part of a wider system including a controller with reversible lane logic.
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The 300mm (12-inch) diameter is the de-facto industry standard for vehicle traffic signals worldwide. It is accepted by MUTCD in the US, EN 12368 in Europe, GB 14887 in China and equivalent standards in most other jurisdictions. The diameter provides adequate viewing distance (200-300m) for typical urban and suburban intersection speeds (40-80 km/h) while keeping hardware cost and structural load moderate.
GAOQIAO 300mm signal heads are available in 1-aspect, 2-aspect, 3-aspect and 4-aspect configurations. The 3-aspect red-yellow-green is the most common. The 4-aspect adds a turn arrow. The 2-aspect red-green and red-yellow are used for special applications like ramp meters, reversible lanes and one-way exits. All aspects are available with optional countdown timer overlay.
Yes. GAOQIAO 300mm signal heads use industry-standard wiring (typically 4-conductor cable) and voltage (12-24 VDC or 110-220 VAC), making them compatible with virtually any major traffic signal controller worldwide. We supply wiring diagrams and pin assignments for matching to specific controller models. Many municipalities use GAOQIAO signal heads as drop-in replacements for older or failed units.
The optional countdown timer is an integrated LED overlay on the red or green aspect of the signal head. During the lit phase, the timer counts down the seconds remaining. The timer is configured by the controller to match the phase plan. Power consumption increases by approximately 1-2W per aspect with the timer enabled.
The 300 mm (12-inch) lens size is the international standard for arterial roads and meets ITE VTCSH Part 1, EN 12368 and GB 14887 visibility distance requirements. Under clear daytime conditions, the 12-inch LED traffic light is fully recognizable from 300 meters away, with the red indication clearly distinguishable from 200 meters. At night, the recognition distance is 500 meters or more.
GAOQIAO 12-inch LED traffic lights are available in standard red, yellow, green, blue and white aspects. We also offer ball, arrow, bicycle, pedestrian, tram, bus, U-turn and crosswalk symbols. The lens can be tinted or clear, and the housing can be finished in matte black, dark gray, traffic yellow or custom RAL. Animated countdown and dynamic lane-control symbols are available for advanced intersection projects.
Each 12-inch aspect has a 4 kV surge protection device on the AC input, plus a TVS diode array and PTC self-resetting fuse on the LED driver. For sites with frequent lightning events or unstable mains power, we recommend the optional 10 kV SPD module. The IP65 housing is sealed with a silicone gasket and a Gore-Tex vent to prevent internal condensation during thermal cycling.
About GAOQIAO — Nanjing Gaoqiao Traffic Technology Co., Ltd. is a Chinese LED traffic light manufacturer with 17+ years of export experience. For international traffic signal standards, see the EN 12368 standard and the MUTCD (US).
This section summarizes the most common commercial and technical questions that importers, contractors and government procurement officers ask before issuing a purchase order for 12-inch led traffic light 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 12-inch led traffic light 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 12-inch led traffic light 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.