If you're looking for a meeting place or a good stop around ½ or halfway between Sindi, Estonia and Rakvere, you can try Paide, Estonia, which is almost an hour northeast of Sindi, Estonia, or about 1 hour southwest of Rakvere.
About ¼ or a fourth of the way, you can stop at Vandra, Estonia. This is about half an hour northeast of Sindi, Estonia.
About ⅔ or two thirds of the way, you can stop at Jarva-jaani, Estonia. This is about 1½ hours northeast of Sindi, Estonia, or about half an hour southwest of Rakvere.
About ¾ or three fourths of the way, you can stop at Tamsalu, Estonia. This is about 1½ hours northeast of Sindi, Estonia, or about half an hour southwest of Rakvere.
If you drive straight through without stopping at all, the total distance is 162 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, 3 minutes.