Providing Public Transportation
Alternatives for the Greater
Phoenix Metro Area

Transit Definitions

Here are some commonly used transit terms used in Valley Metro’s data and their definitions:


A collection of trips assigned to a vehicle for a day.


One of two possible directions of travel –this can be eastbound and westbound, inbound and outbound, clockwise and counterclockwise, etc, -- on a route.

Location ID

The unique number that identifies each bus stop and light rail station. Publicly this number is referred to as a StopID.


A unique travel path through the street network to visit selected stops for one trip.


A collection of ordered stops presented publicly as a "line" with a name (such as "0-Central") and represented internally as an integer.


One of several stops on each route that serves as a benchmark for whether a trip is running on time.


An iteration of a vehicle traveling along a given pattern.