One mile travelled by one train, as a unit of traffic.
Example sentencesExamples
In the immediate aftermath of the crash, the Health and Safety Executive wrote, ‘Rail breaks on the infrastructure rose from 2.75 to 3.31 per million train miles.’
Our hero took his chance and legged it, grabbing his coat and case and jumping train miles from home.
Train accidents per million train miles rose by 6 percent over the same period.
After a 20 per cent growth in train miles since 1995, many parts of the network are full - though passenger numbers are still growing.