Usage patterns
〈場所〉へ行く途中でon the way to (a place)
I stopped at a convenience store on the way to the station.
〈事〉の途中でin the middle of (an event or activity)
The phone rang in the middle of the meeting.
途中で〈動詞〉をやめるto quit (doing something) partway through
I stopped doing my homework halfway through.
途中で気が変わるto change one's mind midway through something
I changed my mind partway through the trip and decided to go home.