What South East Queensland’s first prolonged weekday shutdowns taught us about planning alternative transport
South East Queensland’s first prolonged weekday rail closures challenged many of the assumptions that traditionally underpin rail replacement planning. During the delivery of Cross River Rail, extended periods of work in the rail corridor began impacting weekdays for the first time.
While simply scaling weekend operations to accommodate weekday patronage would already be challenging due to the volume of passengers requiring alternative transport, it was made more complex by the uncertainty of how rail passengers would choose to travel during weekday disruptions, and what factors would be the most influential in driving behaviour change.
Traditional rail replacement operations responding to planned corridor maintenance assumes a relatively predictable customer response.
Weekend patronage is relatively low, and there are less distinguishable peak periods to manage.
Standard service responses typically consist of all-stations routes replicating the rail timetable and stopping pattern
What we found during weekday closures was a much different picture. Customers adapted in a variety of ways.
While some used rail replacement bus services, others shifted to urban bus services, travelled on different lines, altered their travel patterns or chose not to travel at all. Customer feedback suggests these behaviours are evolving over time as people became more familiar with the alternatives travel options available to them.
This creates a level of uncertainty not normally encountered during routine weekend possessions and raises an important question: if customer behaviour is difficult to predict, how should alternative transport services be planned?
Why extended weekday closures are different
Each weekday closure operation inevitably presents different variables that impact customer behaviour. Closure limits vary depending on the scope of work being undertaken, and how people respond to each closure is dependent on the alternative transport options available and wider economic factors.
Challenge | Why it matters |
| Customer behaviour is uncertain | Customers may use rail replacement buses, urban bus services, private vehicles or choose not to travel. Seasonal and economic variations also impact travel behaviour. 50c fares and higher fuel prices weigh into the travel choices customer make. |
| Demand changes over time | Travel patterns evolve as customers become familiar with alternative travel options, and incremental improvements are made to the rail replacement operations. |
| Resources are constrained | Bus drivers and fleet are limited resources, and often regional and interstate resources have to be utilised to provide sufficient bus capacity. Fleet, drivers and road network capacity must be sustained for weeks rather than days. |
| Operational conditions vary | While providing consistency is prioritised as much as possible, there are often multiple rail configurations during closures that have different customer-facing impacts and require different bus operations to support. Changes to bus infrastructure and the urban bus network more generally can also result in different alternate options available to customers between closures. |
Rather than replicating rail services as closely as possible, planners need to understand how customers are likely to use the wider transport network and where intervention will provide the greatest value.
Weekend planning doesn’t scale to a weekday
Queensland’s traditional rail replacement model is built around buses operating to all affected stations at regular intervals, broadly replicating the rail stopping pattern. That approach works well when demand is lower and spread throughout the day.
Weekday closures create a different operating environment:
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Peak demand concentrates
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Customer expectations around travel time and reliability increase
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Fleet and driver requirements grow significantly
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Traditional rail replacement models become difficult to sustain over extended periods
The challenge therefore becomes finding ways to move large numbers of people efficiently without simply scaling up a weekend operating model.
Customer behaviour matters more than rail patronage
One of the most valuable lessons from the program was that rail patronage and rail replacement demand are not the same thing.
Rail replacement boarding data provided valuable information about usage of those services, but did not capture the full range of customer responses. Many customers continued travelling using existing urban bus routes, private vehicles or other travel options that could not easily be directly observed.
Customer surveys therefore became an important complement to operational data. Together, these sources helped build a more complete understanding of how customers adapted to disruption and how those behaviours changed throughout successive closure periods.
The key planning question was not simply, “How many rail passengers are affected?”
It was, “How will those customers choose to travel during the closure?”
That distinction fundamentally changes how replacement transport services should be designed.
Case study: Boggo Road to Varsity Lakes
The first planned weekday shutdown of the Beenleigh and Gold Coast lines south of Boggo Road provided an opportunity to put these principles into practice on a new operation.
The closure affected 85 kilometres of railway on a corridor that would typically carry more than 20,000 passengers daily. To understand the customer experience, the project team mapped complete journeys in both directions, examining every stage of travel from home to destination and back again.
This exercise highlighted a number of issues that are often hidden within corridor-level planning, including:
- Local bus connections
- Bus stop and station capacity
- Layover constraints
- Driver shift limitations
- Road congestion impacts
- The needs of customers travelling to destinations outside the CBD
The analysis led to four key operational decisions, each tested against travel time data, patronage forecasts, stop capacity assessments and journey-planning outcomes before implementation.
Challenge | Why it matters |
Leverage the South East Busway | Improve travel speed and journey time during peak periods compared to the M1 from the busway extension at Springwood through to Boggo Road. |
| Connect services at Eight Mile Plains | Give customers more travel options to get as close to their destination as possible without requiring a second transfer while shortening trips to manage driver shift limitations. |
| Introduce stops closer to Central station | Reduce the overall journey time for customers by servicing bus stops closer to key destinations, utilising stop capacity made available by changes to Brisbane’s urban bus network. |
| Targeted urban bus uplift | Thorough journey plan testing revealed the routes most likely to experience patronage uplift during the closure, and targeted uplift was provided to support where feasible. |
What this means for future programs
Extended weekday rail closures require more than an upscaled version of a traditional rail replacement plan, they require an operating model that acknowledges uncertainty and is capable of adapting as customer behaviour evolves.
Several lessons have emerged from South East Queensland’s extended weekday closures:
- Customer behaviour changes over time.
- Different corridors have different alternative travel options available that will influence how customers travel during disruptions.
- Rail replacement demand is only one component of the overall travel response.
- Existing public transport networks can often absorb a significant portion of demand, especially during school holidays.
- Continuous measurement and evaluation are critical to improving future closures.
Perhaps the most important lesson was that success was not only defined by how many customers used replacement buses. Success came from understanding how customers adapted and designing the transport response around that behaviour.
After each closure period, replacement bus volumes, travel times, stakeholder feedback and broader network impacts are reviewed. Those insights always inform future planning and are progressively improving the operating model.
For future extended rail closures, the opportunity is not simply to replace rail services, it is to better understand customer behaviour and use that understanding to deliver more efficient, reliable and customer-focused transport outcomes network-wide.