Metro Transit’s GTFS includes a few extensions to the GTFS standard. These elements are documented below. Please note this is intended to supplement documentation on GTFS itself.
Indicates the cardinal direction of travel for a trip.
NB = northbound
SB = southbound
EB = eastbound
WB = westbound
Indicates the trip’s branch or variant.
Metro Transit’s service includes many branches. Trips with the same route_id serve meaningfully different stops and destinations based on their branch_letter. When referring to a specific trip, the branch_letter should always be included along with the route_id.