As Europe faces record summer heat, roads in the UK and other countries have been observed softening and rail tracks warping at temperatures around 40°C. In contrast, India's highways routinely endure summer temperatures exceeding 50°C, and even 60°C in some regions, without similar damage. This difference stems from the materials used in road construction.
European roads typically use asphalt with a softening point around 40-50°C, designed for milder climates. When temperatures spike, the bitumen binder can soften, leading to rutting and deformation. Indian highways, however, are built with modified binders that have higher softening points, often above 60°C, to withstand extreme heat. The Indian government has also adopted polymer-modified bitumen for major highways to enhance durability.
According to a 2025 report by the International Road Federation, India's National Highway Authority uses a specific grade of bitumen (VG-40) that performs well at high temperatures. In contrast, many European countries use lower-grade binders (e.g., pen 50/70) that are more prone to heat damage. Climate change is pushing European infrastructure beyond its design limits, prompting calls for updated standards.
Rail infrastructure faces similar challenges. In the UK, Network Rail imposes speed restrictions when tracks exceed 50°C to prevent buckling. Indian Railways, operating in hotter climates, uses welded rails with expansion joints and heat-treated steel to handle thermal expansion. A 2024 study by the University of Cambridge noted that adapting infrastructure to rising temperatures could cost billions but is essential for resilience.
While India's roads are better adapted to heat, they face other issues like monsoon damage and heavy traffic loads. The comparison highlights how infrastructure must be tailored to local climate conditions, a lesson increasingly relevant as global temperatures rise.
