SFMTA Performance Metrics

Percentage of on-time performance

https://www.sfmta.com/reports/percentage-time-performance

SFMTA's definition and methodology:

• The percentage of observed time point arrivals that are between one minute early and four minutes late.
• Time point arrival data from the NextBus system are used to compare actual vs. scheduled arrival times.

Percentage of transit trips with bunching or gaps

We should do this for all lines, not just the Rapid Network.
https://www.sfmta.com/reports/percentage-transit-trips-bunching-or-gaps

SFMTA's definition and methodology:

• The percentage of observed time point arrivals on the Rapid Network with spacing of less than two minutes (one minute for scheduled headways of less than five minutes) or gaps of greater than 5 minutes beyond their scheduled headway (time between vehicles) times. The Rapid Network includes the 5R-Fulton Rapid, 7R-Haight/Noriega Rapid, 9R-San Bruno Rapid, 14R-Mission Rapid, 28R-19th Avenue Rapid, 38R-Geary Rapid, J-Church, KT-Ingleside/Third Street, L-Taraval, M-Ocean View and N-Judah lines
• Time point arrival data from the NextBus system are used to compare actual vs. scheduled headways (time between vehicles). A bunch occurs if a vehicle arrives less than two minutes after a preceding vehicle, or less than one minute for routes with vehicles scheduled to arrive every 5 minutes or less. A gap occurs if a vehicle arrives 5 minutes later than the scheduled headway.