Usage patterns
〈場所〉から〈場所〉までの経路the route from one place to another
I looked into several routes from Tokyo to Osaka.
〜という経路をたどるto go through a certain process/course
That decision was reached through a complicated process.
経路をたどるto trace/follow a route or process
They investigated by tracing the virus's route of infection.
経路を変更するto change a route
They changed the delivery route because of construction work.