If you're looking for a meeting place or a good stop around ½ or halfway between Castelfranco Emilia and Russi, you can try Castenaso, Italy, which is about half an hour east of Castelfranco Emilia, or about half an hour west of Russi.
About ⅓ or a third of the way, you can stop at Bologna, Italy. This is about half an hour southeast of Castelfranco Emilia.
About ¾ or three fourths of the way, you can stop at Imola, Italy. This is almost an hour southeast of Castelfranco Emilia, or about half an hour west of Russi.
If you drive straight through without stopping at all, the total distance is 99 km. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 1 hour, 15 minutes.