Cable trays for highways

Highway cable trays provide durable, code-compliant support for power, communication, and lighting systems across bridges, tunnels, and roadways.

Applications and Purpose

Cable trays are widely used in highway infrastructure to safely route and support power, lighting, fiber optic, and communication cables. They are essential for Intelligent Transportation Systems (ITS), traffic signals, CCTV, message signs, and roadway lighting . Their open-tray design allows for rapid installation, easy maintenance, and future upgrades, making them ideal for dynamic highway environments .

Types of Cable Trays

Highway cable trays come in several configurations:

• Ladder trays: Provide strong support for heavy power cables and allow excellent ventilation .
• Perforated trays: Suitable for medium-duty applications, offering good airflow and cable protection .
• Wire mesh trays: Lightweight, flexible, and easy to install, ideal for complex routing .
• Channel trays and strut systems: Offer modularity and adaptability for various cable layouts .

Materials and Durability

Cable trays for highways are manufactured from stainless steel (304 or 316L), galvanized steel, aluminum, and fiberglass-reinforced composites (FRP/GRP) . These materials provide corrosion resistance against de-icing chemicals, salt spray, and humidity, as well as UV stability for outdoor exposure . Stainless steel trays are often used in tunnels and high-moisture environments due to their superior durability .

Design Considerations

Highway cable trays are engineered to withstand dynamic loads from traffic-induced vibrations, wind, and thermal expansion . Ventilated designs help dissipate heat from high-load power and dense data bundles, while ladder and trough styles facilitate drainage and debris shedding . Expansion splice plates and guided supports accommodate temperature fluctuations over long bridge spans.

Standards and Compliance

Highway cable trays are designed to meet national and international standards, such as CEI 64-20 and EN 61537, ensuring safety, reliability, and compatibility with transportation infrastructure requirements . IMQ certification further validates quality and compliance for tunnel and bridge installations .

Advantages

• Rapid installation and maintenance due to open-tray architecture .
• Future-ready capacity for adding new devices or upgrading fiber networks .
• Lower total cost by reducing fittings, pull points, and labor .
• Robust support for heavy cables and instrumentation .
• Adaptability for complex layouts and evolving highway systems . Highway cable trays are a critical component for modern transportation infrastructure, providing safe, durable, and flexible cable management that supports both current and future roadway electrical and communication needs.