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Traffic Light Materials: Common Types, Pros and Cons for Outdoor Use

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Nanjing Gaoqiao Traffic Technology Co., Ltd

NJGQ has 17 years history in traffic light design and making since 2006, we also have partnered with Siemens (China) since 2016.Our focus and advantages are: traffic light & traffic light controller, whether it is normal power or solar power, portable or mobile, normal or solar warning traffic light, all kinds of traffic signal board, as well as light poles

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Traffic Light Materials: Common Types, Pros and Cons for Outdoor Use

Traffic signal housings and mounting frames stacked in a workshop

date:2026-03-11 12:54:26

Last Updated: March 11, 2026 | For Traffic Infrastructure Buyers, Engineers and Global Procurement Teams
Traffic lights require heavy-duty, weatherproof materials to endure constant outdoor exposure, extreme temperatures and long-term daily use, with three core materials dominating the global manufacturing industry. Leading Chinese traffic light manufacturers such as Nanjing Gaoqiao Traffic Technology Co., Ltd. carefully choose high-grade materials to balance durability, operational lifespan, cost efficiency and full compliance with international traffic safety standards.
 
Aluminio fundido a presión stands as the most widely used material for traffic light main housings. It delivers superior corrosion resistance, exceptional structural rigidity and efficient heat dissipation, making it perfectly suited for harsh outdoor climates including heavy rain, snow and high humidity. While it is lightweight for installation and highly durable, it comes with a higher upfront production cost compared to plastic-based options.
UV-Stabilized Polycarbonate (PC) is the industry standard for traffic light lens covers and external casing panels. It offers unrivaled impact resistance, crystal-clear optical transparency and long-lasting UV protection, preventing yellowing, fading or cracking under prolonged direct sunlight. This material is cost-effective and highly moldable for custom designs, though it has lower heat tolerance than die-cast aluminum.
ABS Plastic is typically used for internal structural components and entry-level, low-budget traffic light units. It is budget-friendly, lightweight and simple to machine and assemble, but lacks strong heat resistance and long-term outdoor durability, making it unsuitable for permanent use in extreme or harsh environmental conditions.
Premium LED traffic lights from reliable suppliers like Nanjing Gaoqiao – an official Siemens traffic light supplier since 2014 – combine die-cast aluminum housings and UV-stabilized polycarbonate lenses for peak performance, reliability and compliance with global quality norms for international infrastructure projects.

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Nuestros puntos fuertes y especialidades son los semáforos y controladores, con alimentación convencional o solar, portátiles o móviles, luces de advertencia convencionales o solares, todo tipo de paneles de señalización y postes.

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