List of route patterns. Route patterns are used to describe the subsets of a route, representing different possible patterns of where trips may serve. For example, a bus route may have multiple branches, and each branch may be modeled as a separate route pattern per direction. Hierarchically, the route pattern level may be considered to be larger than the trip level and smaller than the route level. For most MBTA modes, a route pattern will typically represent a unique set of stops that may be served on a route-trip combination. Seasonal schedule changes may result in trips within a route pattern having different routings. In simple changes, such a single bus stop removed or added between one schedule rating and the next (for example, between the Summer and Fall schedules), trips will be maintained on the same route_pattern_id. If the changes are significant, a new route_pattern_id may be introduced. For Commuter Rail, express or skip-stop trips use the same route pattern as local trips. Some branches do have multiple route patterns when the train takes a different path. For example, CR-Providence has two route patterns per direction, one for the Wickford Junction branch and the other for the Stoughton branch.

Show a particular route_pattern by the route's id. Route patterns are used to describe the subsets of a route, representing different possible patterns of where trips may serve. For example, a bus route may have multiple branches, and each branch may be modeled as a separate route pattern per direction. Hierarchically, the route pattern level may be considered to be larger than the trip level and smaller than the route level. For most MBTA modes, a route pattern will typically represent a unique set of stops that may be served on a route-trip combination. Seasonal schedule changes may result in trips within a route pattern having different routings. In simple changes, such a single bus stop removed or added between one schedule rating and the next (for example, between the Summer and Fall schedules), trips will be maintained on the same route_pattern_id. If the changes are significant, a new route_pattern_id may be introduced. For Commuter Rail, express or skip-stop trips use the same route pattern as local trips. Some branches do have multiple route patterns when the train takes a different path. For example, CR-Providence has two route patterns per direction, one for the Wickford Junction branch and the other for the Stoughton branch.