If you're looking for a meeting place or a good stop around ½ or halfway between Detroit and Chelsea, MI, you can try Plymouth Township, MI, which is about half an hour west of Detroit, or about half an hour east of Chelsea, MI.
About ¼ or a fourth of the way, you can stop at Redford, MI. This is about 14 minutes west of Detroit.
About ⅓ or a third of the way, you can stop at Livonia, MI. This is about 18 minutes west of Detroit.
About ⅔ or two thirds of the way, you can stop at Dixboro, MI. This is about half an hour west of Detroit, or about half an hour east of Chelsea, MI.
About ¾ or three fourths of the way, you can stop at Ann Arbor, MI. This is almost an hour west of Detroit, or about 16 minutes east of Chelsea, MI.
If you drive straight through without stopping at all, the total distance is 57 miles. 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 58 minutes.