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Urban Redevelopment Authority (URA)

Major Infrastructure Workflow

Learn how the Major Infrastructure Workflow strengthens coordination between agencies, utility and infrastructure stakeholders from planning through to implementation.

Last updated 23 June 2026

Major Infrastructure Workflow

As Singapore's infrastructure network becomes increasingly complex, close coordination is needed to ensure that major projects are planned and delivered efficiently.

Introduced in 2024, the Major Infrastructure Workflow is a dedicated coordination process to strengthen collaboration across infrastructure agencies and utility licensees. It brings together agencies and private sector stakeholders to plan and coordinate major infrastructure projects along key corridors, from early planning and design through to implementation, over a 15-year horizon. This ensures that sufficient capacity can be built in with future development in mind.

Supported by INPAC (Infrastructure Network Planning and Alignment Clearance), a centralised digital consultation platform, the workflow progresses across five stages, with each building on the previous one.


Flowchart of the stages of the workflow. From Conceptual Planning to Preliminary design, to detailed design and construction


Conceptual Planning Stage

During this stage, stakeholders coordinate closely to identify and evaluate potential options for network alignments. This is made possible through processes such as upfront enhanced site investigations, data collection of existing and proposed utilities and infrastructure, and conceptual desktop studies. The objective is to determine the most feasible space and implementation optimisation options to be studied in greater depth in the next stage, while reducing the risk of abortive works and delays downstream.

Preliminary Design Stage

In this stage, the options identified during Conceptual Planning are studied in greater depth. Feasibility studies on technical, cost, and implementation considerations are assessed to determine which option best meets the project's needs. The goal is to arrive at a recommended space and implementation option that is practical, cost-effective, and can be delivered with minimal disruption — which is then carried forward into detailed design.

Detailed Design Stage

The recommended space and implementation option is further developed into a full and detailed design in this stage. Any outstanding issues from the previous stage are resolved and necessary approvals obtained prior to commencement of construction works.

Construction and Implementation Stage

With all approvals in place, the Construction and Implementation Stage involve the physical construction of the approved infrastructure and utility works in accordance with the recommended space and implementation optimisation option.

Completion Stage

Once construction is complete, the newly built infrastructure is surveyed and documented to ensure accurate records are kept for future planning. Where applicable, the completed assets are then handed over to the respective agencies and service providers for ongoing operation and maintenance.