ABSTRACT
This paper focuses on the Cross Island Line (CRL), a major infrastructure project aimed at enhancing Singapore’s rail connectivity. Spanning over 50 km, it will be Singapore’s longest fully underground metro line, tackling complex engineering challenges due to the island’s geological diversity and in an increasingly built-up urban environment. Key innovations include large-diameter Tunnel Boring Machines, the On-Board Muck Weighing System (OBMWS) and integration of Building Information Modeling (BIM) with other digital initiatives. Sustainability initiatives like steel fibre reinforced concrete green steel, and electric construction equipment are crucial to reducing carbon emissions, making CRL a benchmark in sustainable urban infrastructure development.
