Introducing the turn-up-and-go Brisbane Metro - an Australian first

Brisbane Metro: keeping Brisbane moving

Brisbane’s population is expected to grow from 2.8 million to 3.4 million over the next decade, with hundreds of thousands of additional visitors expected for the Brisbane 2032 Olympic and Paralympic Games. The busway had already reached capacity, resulting in congestion at key CBD intersections, unreliable journey times and productivity losses. Without intervention, the network risked falling further behind population growth, but incremental upgrades would not be sufficient.

Image credit: Brisbane City Council

Brisbane Metro is Brisbane City Council’s (Council’s) response to this challenge. Brisbane Metro delivers metro-style, turn-up-and-go public transport via two new dedicated routes, supported by a fleet of electric, bi-articulated vehicles with three passenger compartments connected by two flexible joints.

The new electric vehicles, each capable of carrying 150 passengers (and up to 170 during event mode) significantly increase capacity without adding more vehicles to the already constrained network.

In parallel, Brisbane Metro was introduced alongside a city-wide reconfiguration of bus services to complement Brisbane Metro operations. This network-wide change was critical to relieving congestion, managing capacity constraints and ensuring the Brisbane Metro could function as the backbone of Brisbane’s bus network, rather than as a standalone service.

Supporting infrastructure upgrades included longer platforms, improved wayfinding, new charging facilities along the busways, slow charging at a purpose-built depot, and the conversion of Victoria Bridge into a active and public transport bridge, prioritising bus and metro vehicle movements while improving walking and cycling connectivity.

Supporting Council’s transition from construction to passenger operations

We were initially engaged by Council in 2016 to provide specialist technical advisory services, supporting problem definition, option analysis, business case development, reference design and performance specification. This work helped Council assess alternative rapid transit options and understand the operational, constructability and network impacts of each.

That early advisory phase informed the decision to adopt a high-capacity BRT solution that could be delivered within the existing busway environment, avoiding the disruptive option of new rail and associated construction, while achieving congestion-reduction objectives.

Retrofitting existing infrastructure significantly reduced the project’s cost, construction complexity and carbon footprint, delivering a more sustainable outcome for Brisbane.

In 2023, we were re-engaged to support the transition from delivery into safe, reliable passenger operations through operational readiness and assurance services.

Our scope included:

• Systems integration strategy
• Capturing operational definition and procedures
• Trial and commissioning planning
• Training and operational documentation inputs
• A single repository for hazards, risks and controls
• Minimum operating standards and assurance frameworks. 

Our team worked closely with Council and was embedded within their operational readiness function, also working closely with state government stakeholders, including TMR and Translink.

Introducing a novel system into a live network

Brisbane Metro introduced several first-of-their-kind elements into a live, high-use network, including new electric vehicles, charging infrastructure, intelligent transport systems, and revised operating and service models.

“A key challenge was the reliance on implied knowledge within the existing bus network,” says Simon MacMull, global systems engineering, integration and operations leader. “Introducing new vehicles and technology meant operations could no longer be treated as ‘business as usual’, requiring a fundamental reassessment and documentation of operational plans.”

Changes also created ripple effects across the wider network, impacting routes, timetables, driver training and communications. While not always within the direct scope, these dependencies had to be considered as part of operational readiness planning to avoid unintended consequences.

Adapting rail-grade assurance to a bus network

Drawing on international experience delivering complex transit systems, we developed a holistic operational readiness and assurance program tailored to Brisbane Metro.

Our approach adapted proven rail assurance principles, including risk-based planning, progressive assurance and evidence-led decision-making, to a live bus network environment, without introducing unnecessary complexity. A staged delivery approach was central.

Defining readiness and building assurance

Our goal was to provide Council and operators with confidence that the system could enter service safely and reliably.

We began with an assessment of operational readiness maturity to identify gaps and priorities, then translated recommendations into structured delivery phases. We defined what needed to be proven, how it would be tested and what evidence would be required.

Key focus areas included:

• Defining system and operator testing plans
• Assessing people, process and technology readiness
• Building an assurance case for a novel system entering service

Operational readiness raised fundamental questions about how the new system would function in practice: what ideal operation looked like, what could remain unchanged, what needed to evolve, and how teams would respond in both normal and disrupted conditions. Clarifying roles, responsibilities and decision-making in these scenarios was central to building a system that could operate consistently under pressure.

We developed operational definition documents that describe how the system would operate across different scenarios and locations. These became the foundation for standard operating procedures and training materials, helping to embed consistency and build confidence across the network.

Proving the system works as a whole

Readiness was demonstrated through a comprehensive testing and trial programme comprising more than 200 tests across trial running, trial operations and day-one scenarios.

Testing focused on the system as a whole, rather than individual components, assessing how vehicles performed under extended operation, how charging infrastructure operated under peak demand, and how the system responded under degraded conditions such as vehicle breakdowns or blocked charging bays. Passenger interaction, accessibility and usability were also tested to ensure the system worked for the people using it.

Stress testing helped operators understand system limits and define appropriate responses. Where risks could not be fully eliminated, mitigations were introduced.

“The aim was to build a robust assurance case using data, not gut feel,” explains Monica.

Testing within a live network

Testing took place within a live operating network, with constraints including busway availability and ongoing construction. Much testing occurred overnight, requiring careful management and planning.

Tunnel commissioning added further complexity, with early driver exposure to operational scenarios including breakdowns, towing, and evacuation, alongside tunnel finishing works.

At stations and interchanges, end-to-end journeys were tested to confirm announcements, digital systems, accessibility and passenger flows worked consistently, particularly during high-demand event scenarios.

Over 200 tests were completed over six months during the trial phases (image credit: Brisbane City Council)

Delivering confidence at go-live

Brisbane City Council now has a clear, evidence-based understanding of how Brisbane Metro operates in normal, degraded and exceptional circumstances. A minimum operating standard for electric vehicles brings together knowledge into a single, accessible resource for drivers and support teams.

The program established a repeatable framework for introducing novel transport systems into live networks, one that balances safety, reliability and operational confidence, and provides a strong foundation for future network expansion.

For passengers, Brisbane Metro delivers a new way to move. With more frequent services, smoother journeys and greater reliability at peak times, passengers can move easily through the city, while enjoying improved station access, safer connections for walking and cycling, and seamless integration with bus and rail services and other end-to-end travel options.