GPR: A Key Tool for Safer Roads

On September 26, 2025, iNFRA participated in a road safety inspection along Samsen Road using the Impulse Radar Crossover 4080, a GPR device equipped with dual frequencies (400 and 800 MHz). The objective was to assess the risk of subsurface voids beneath the pavement. The collected data supports authorities in planning effective repairs, reducing both safety risks for personnel and residents in Bangkok.

Roads are the lifelines of a nation, yet what lies beneath can become a hidden danger. Subsurface “Voids” can lead to ground settlement, collapse, or severe accidents — often without any warning signs for road users.

Risks That Lead to Subsurface Voids

• Erosion caused by rainwater and groundwater
• Leakage or rupture of underground utilities
• Inadequate soil compaction during construction
• Continuous vibration from prolonged road usage

As these factors accumulate, voids expand progressively and may cause sudden collapses, resulting in significant threats to both lives and maintenance budgets.

Why Use GPR for Void Detection

Ground Penetrating Radar (GPR) is a vital technology for scanning and investigating pavement subsurfaces. Its key advantages include:

• Non-invasive inspection: Detects voids without damaging the road structure
• Unseen detection: Identifies voids, soil density, and pavement structure beyond the naked eye
• Accuracy and efficiency: Covers large areas in a short time
• Proactive prevention: Early detection allows timely repairs and helps reduce major maintenance costs

iNFRA Service Commitment

We are dedicated to enhancing infrastructure quality with expert teams from the iNFRA group:

• Infra Plus Co., Ltd. (Consultant)
• B – innovation Co., Ltd. (Trading)
• Infra Serve Co., Ltd. (Service)