Correct. I don't know if this is still true, but there used to be an effort to keep a greater percentage of trains on time by delaying already late trains furt

Correct. I don't know if this is still true, but there used to be an effort to keep a greater percentage of trains on time by delaying already late trains further (by prioritizing on time trains over them). As a railway brat, I miss long distance train travel like crazy.