CSX likes to keep a relatively tight leash on its power, both as far as distance and time away from home iron. There seemed to be -- from horn sounds -- one each way before and after midnight 06-15 and 06-16. Actual traffic depends on how much is CSX-routed east and westbound and the CSX power that PAR has, which can produce light power moves or even several units on two dozen cars westbound.
To reduce the unpredictability, find a location that's not a D-3 TOM dead-zone on your scanner. If you have the patience for fishing, the Worcester Line is a good spot, both for the real fish in the reservoir and the metaphoric fish that hopefully will never be in the reservoir or on the ground. If you're not already familiar with the line, there are also talkers at 7.8 (Rte. 140) in West Boylston and 15.4 (South Meadow off Rte. 110, west of the high school) in Clinton to give a heads-up about approaching or receding activity.
"A gray crossover is definitely not company transportation."