PPGI in Transportation and Public Infrastructure – From Noise Barriers to Subway Stations

Introduction: Beyond Buildings

While construction is the largest market for PPGI, the material is increasingly specified for transportation and public infrastructure projects due to its durability, fire resistance, and design flexibility.

Highway Noise Barriers

PPGI is widely used for sound barriers along highways and railways. The material withstands outdoor exposure while providing the necessary acoustic performance.

Traffic and Road Furniture

• Traffic signs: PPGI provides excellent color retention and reflectivity

• Guardrails: Galvanized steel with optional coating layers offers long-term corrosion resistance

Subway and Railway Stations

Public transit authorities are specifying PPGI for station interiors because of its fire safety and design flexibility. In 2025, KG Steel developed Korea’s first flame-retardant PCM (Pre-Coated Metal) steel, suitable for subway platforms and public indoor spaces. The three-coat process adds printing and transparent coating layers, expanding design possibilities while maintaining fire resistance.

Airport Terminals

As mentioned previously, major airport projects such as Taiyuan Wus International Airport have utilized high-durability PVDF-coated PPGI.

Maritime and Container Applications

PPGI is used in:

• Container panels for shipping and storage

• Ship interiors (cabins, bulkheads) requiring corrosion resistance

Emerging Application: Smart Logistics Facilities

Warehouses and distribution centers are increasingly using PPGI for their enclosures. For example, the Yudong Zijin Intelligent Logistics Park in China selected high-durability PPGI for its corrosion resistance and self-cleaning properties.

Conclusion

The transportation and public infrastructure sectors are expanding their use of PPGI, driven by requirements for fire safety, durability, and aesthetic consistency.

For galvanized coils suitable for transport-grade PPGI substrates, visit our product page or contact us.