The Century Avenue renovation project will improve the district’s road network structure and traffic situation, while minimizing the disruption to citizens and businesses. Featuring underground space with subways, cross-street passages, and complex pipe corridors, the large-scale municipal project presented planning and coordination challenges that traditional 2D design could not accommodate. Faced with a short project schedule and multiple design disciplines, the team needed an integrated digital platform to implement collaborative BIM workflows for precise coordination of design and construction.They selected ContextCapture to generate a reality model of the existing conditions, reducing on-site visits and shortening the design period by 28 days. OpenRoads Designer and OpenBuildings fully refined modeling of the pipeline and landscape, resolving clearance conflicts and reducing design changes by over 60%. Overall design efficiency improved by 15% to 20%, saving over CNY 10 million. The 3D model will be further updated to incorporate construction, operation, and maintenance data, forming a digital twin.