WordNet
trunk route
n. line that is the main route on a railway [syn: trunk line]
Usage examples of "trunk route".
It had a manual exchange, an automatic exchange, a tandem exchange for connecting other exchanges to one another, and an amplification station for the all-important new trunk route to Germany.
The support frames carried what seemed like hundreds of differently-coded cable runs and the new passageway was obviously a main trunk route for crew members, but it was no wider or deeper then any of the others they had encountered.