If you're looking for a meeting place or a good stop around ½ or halfway between Laives and Sasso Marconi, you can try Verona, Italy, which is about 1½ hours south of Laives, or about 1½ hours north of Sasso Marconi.
Another possible place to stop near the midpoint is Villafranca di Verona.
About ¼ or a fourth of the way, you can stop at Rovereto, Italy. This is about half an hour south of Laives.
About ⅔ or two thirds of the way, you can stop at Novi di Modena, Italy. This is about 2 hours south of Laives, or almost an hour northwest of Sasso Marconi.
About ¾ or three fourths of the way, you can stop at Modena, Italy. This is a little over 2 hours south of Laives, or about half an hour northwest of Sasso Marconi.
If you drive straight through without stopping at all, the total distance is 279 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 2 hours, 48 minutes.