Our research is enabling faster, heavier freight

SRTs are a measure of how long it takes for a train to travel between two timing points. A key component in timetable planning, they are used by planners to create paths across the network for different trains of varying loads and speed capabilities. 

However, current freight SRTs are often not reflective of modern locomotives’ capabilities. Because they are based on older rolling stock, they may be too conservative. This limits the pathing options available.

About the project 

The goal of ‘Defining the case for optimising sectional running times for freight’ (T1301) was to address the need for systematic updates to SRTs. 

The project uses the methodology developed in the related T1302 project. This redefined locomotive power and resistive forces to accurately set maximum trailing loads for freight trains. 

By looking to optimise SRTs, T1301 aimed to enhance freight train performance, allowing them to run faster and carry heavier loads.

The project involved detailed modelling and analysis of several key freight routes in Wales. These included:

• the South Wales Main Line
• the Vale of Glamorgan line
• routes from Newport to Shrewsbury and Shrewsbury to Dee Marsh and Chirk Kronospan. 

The methodology included:

• route building
• SRT modelling
• resistance calibration
• comparison of modelled timings with existing SRTs and actual timings. 

This comprehensive approach ensured that the findings would be applicable to real-world scenarios.

We found opportunity for substantial improvement 

This project has unearthed a number of important findings. In particular, on every route analysed, historic issues with the timing logic were found.

One key finding was the potential for substantial improvements in train timings. For instance, the project showed that Class 66 timings could be improved by at least 5%. Likewise, Class 70 timings could be improved by up to 23%. 

These improvements could be achieved by recalculating timings using the T1302 methodology. This provides more accurate resistance data for locomotives and wagons.

The project also found opportunities to enhance network capacity and resilience. By addressing speed restrictions and optimising train paths, it would be possible to increase train weight or running speed. This would improve overall efficiency. This is particularly useful for routes with significant gradients, where current speed restrictions can cause delays.

Major benefits for freight 

The benefits of our T1301 project for the freight sector are substantial. By finding ways to optimise SRTs, freight trains can run more efficiently, reducing delays and increasing the capacity of the rail network. This can lead to significant cost savings for freight operators. In fact, the financial benefit of these improvements could be as much as £16 million per year.

In addition, the findings support the development of more accurate and reliable timetables. This can help improve service reliability. This is key for freight operators, who rely on precise timings to meet delivery schedules and maintain customer satisfaction.