Korea Railroad Research Institute

Sensitivity of municipal heatwave vulnerability assessment to population density: Urban-rural spatial shifts in South Korea

As heatwaves become an increasingly recurrent hazard, accurate assessment of local heatwave vulnerability has become increasingly important. This study examined the sensitivity of the heatwave vulnerability index to the inclusion of population density in terms of entropy weights,...

Influence of the microstructure of wheel materials on wear and rolling contact fatigue

Railway wheel–rail rolling contact inevitably causes wear and rolling contact fatigue (RCF) on the contact surface. This study evaluated the wear and RCF behavior of KS60 rail steel against two wheel materials: legacy rolled steel wheel (RSW) and standard ER8 wheel steel. Althoug...

Multistage Cost Estimation Framework for Transparent and Granular Bridge Maintenance

Abstract Bridge maintenance cost is not an isolated variable but a constructed outcome derived from damage size, repair method, and unit cost. However, existing data-driven approaches often treat cost estimation as a black-box prediction problem, providing only aggregated cost va...

Rethinking green transport infrastructure: indirect emissions, mediated impacts, and decarbonization pathways in South Korea

This study examines the relationship between green transport infrastructure and indirect greenhouse gas emissions, focusing on emissions that arise not from vehicle operations themselves but from energy use, thermal demand, and waste generation associated with infrastructure main...