Progressive Railroading, 3/23/18:
Amtrak grades host freight railroads' performance
Amtrak has begun posting a quarterly "report card" that rates how long its trains are delayed while traveling on host freight railroads' tracks.
SNIP
Amtrak's first Host Railroad Report Card gives letter grades to six Class Is based on delays per 10,000 train miles. Specifically, that is defined as the number of minutes of host-responsible delay, divided by the number of Amtrak train miles operated over that host, times 10,000.
The first report card covers January through December 2017. . . .