A primary corridor in a transportation network designed to handle high capacities of freight or passengers over long distances. Smaller feeder routes or branch lines connect to the trunkline to consolidate traffic. In certain regional jurisdictions, such as Michigan, the term specifically denotes any state-maintained highway.
Heard on the job
We run the double-deckers exclusively on the trunkline where the ridership justifies the capacity, and use minibuses for the neighborhood feeders.