The conventional methods used for railway monitoring of geohazards, such as slope stability and sinkholes, along the extensive Gautrain network from Johannesburg to Pretoria, were time-consuming, costly, and often dependent on subjective assessments. To overcome these challenges, the integration of InSAR (Interferometric Synthetic Aperture Radar) analysis with a comprehensive GIS platform has proven to be an effective solution.

InSAR technology significantly accelerates the process of detecting and identifying geohazards along railway lines, providing a more objective and reliable assessment than traditional methods. By utilising InSAR data, displacement across the railway network can be visualized on a color-coded scale, which clearly indicates areas at the most immediate risk and those requiring future monitoring. This visual representation allows stakeholders to quickly prioritize areas that need in-depth local assessment, enhancing the overall efficiency of railway monitoring.

By integrating InSAR data into the GIS platform, field operatives can more effectively target specific areas of concern, enabling a proactive approach to geohazard management. This method not only improves safety and operational efficiency but also results in substantial cost savings by addressing potential issues early on.