| Passenger Wait Time2 | Passenger Travel Time2 |
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| < Headway |
< Big Gap1 |
< 2X Headway |
< 3 minute delay |
< 6 minute delay |
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| Red bar is today |
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| Headway Performance (measured at Park Street) |
Avg. Headway3 |
| Diff. from Published |
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| Early AM |
AM Peak |
Midday |
PM Peak |
Eve. |
Night |
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| Running Time Performance by Segment |
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| Pink highlighted times are delayed > 3 minutes. Red highlighted times are delayed > 6 minutes. |
1. The standard for a big gap is either 1.5 times or 3 minutes greater than the scheduled headway, whichever is lower.
2. Passenger travel and wait time are based on average passenger demand rates per period. I.e. 18000 people entering a station during the peak is a demand rate of
6000/hr or 100/min, which are further divided by destination. The rate is multiplied by the headway of a train to get the number of people boarding that train and by its travel
time to get passenger travel time. It does not account for people not being able to board a train due to crowding.
3. Weighted average headway accounts for the fact that fewer people end up experiencing a short headway than a long headway, since fewer passengers arrive between
trains. |
| Ver. web b0.3 |
