Your item 'MMU helps put bullet trains on track' (The Big Picture, 3 September) includes a statement regarding the wheel wear simulation programs which I would like to clarify.
The wheel wear prediction routines were developed in a collaboration between Manchester Metropolitan University and the Royal Institute of Technology, Stockholm, in a project funded by RSSB. The Vampire Rail Vehicle Dynamics software was developed by, and is a registered trademark of, DeltaRail (formerly AEA Technology).
Combining these two tools has allowed the accurate prediction of wheel wear and the emerging profile shapes.
Adam Bevan
Manchester Metropolitan University
Shape of teamwork
Poll: Should the UK’s railways be renationalised?
I'd hate to be disingenuous so I've replotted the data with the first trendline from 1946 to 1977 and the second using your chosen dates 1983 to 2018....