I just realized the R68A is the only car class that doesn't run on weekends. Which is funny as it's the youngest SMEE car class, yet none of them run weekends.
The is entierly 2xxx 68s and I would imagine 68A 's don't run every weekend, maybe here and there but AFAIK, I know 68A on the weekend is the exception, not the norm.
I used to love riding 68A trains to High School in the late 2000s, glad they get to rest on the weekends these days 😄