When carriers deliver to only a small number of stops on a route they tend to cover the route in a way more similar to a traveling salesman than following a fixed route past every stop.
Some carriers only go to a few stops.
mnli hypothesis: Some carriers only go to a few stops. premise: When carriers deliver to only a small number of stops on a route they tend to cover the route in a way more similar to a traveling salesman than following a fixed route past every stop.