SFMTA’s on-time rate has rounding error

Under city law, Muni isĀ  considered on-time if a bus or train is no more than one minute early or four minutes late. Due to rounding, any time after the minute is rounded down, so a bus or train could be measured as being 4 minutes and 59 seconds late, but still be considered “on-time”. Based on research from the Bay Citizen, the actual Q4 2011 on-time rate was 61.4%, not 71%.