The MBTA is proposing changes to the service delivery policy, and they sound like legitimately good ways to better quantify how useful service is:
- Heavy rail (Red/Orange/Blue) switches from on-time performance to excess trip time: compared to a benchmark fastest trip time and nominal wait time, how long were actual trip times and wait times and whether than excess falls into an acceptable range. This does a much better job of accounting for dropped trips and slow zones - OTP has been 80-90% for the last several years on the Red Line, but ETT has been between 15% and 60%.
- Dropped bus trips are now penalized in OTP calculations, rather than excluded. The presentation notes that frequent routes have more dropped trips.
- Span of service changes from first arrival/last departure to first departure/last arrival, which is apparently more standard for other systems. The expected spans have been appropriately widened - light rail went from 6am-12am to 530am-1230am, for example - so that the effective span is really the same.
- Minimum frequency for frequent bus routes is now 15 minutes all day every day, rather than 10 peak / 15 off peak / 20 nights and weekends
- New accessibility measures for bus stops, ferry docks, and ferries
- Most elevator outages (even when shuttles are provided) are now considered inaccessible platform hours. Only specific situations like planned replacements are excluded. (This knocks platform accessibility from 99.4% to 97.6%)
- Crowding metrics added for heavy rail because new data is now available.
- Updated terminology: “Key Bus Routes” are now “Frequent Routes”; “Commuter Rail” referred to as “Regional Rail”; “Community” routes are now “Coverage”
The bus SDP changes actually make tradeoffs that "penalize" some standards in favor of tighter standards elsewhere
Frequency standard change:
Prior to December 2024, KBR had 20 minute evening and weekend frequencies compared to heavy and light rail.
After December 2024, the 10 minute rush hour standard for KBRs is being removed, although evening and weekend frequency improve. This means the MBTA is no longer obligated to provide 10-14 minute rush hour frequencies on KBR, which means a poorer rush hour standaed for FBRs compared to heavy and light rail.
IMO, weekend and evening frequencies are a win, but it's a loss of rush hour frequencies, but it is a win for flatter service standards.
Ideally, Boston would need to cough up enough ambition to run a 10 minute network from 7:00 a.m. to 10:00 p.m. Monday through Friday, 8:00 a.m. to 10:00 p.m. on Saturday, then 15 minute frequency after 10pm and on Sundays.
Span of service standard change:
The new proposed change using outer terminals instead of inner terminals is pretty darn good in how longer routes like the 57 are now getting properly "penalized" for it's sheer distance. As now, longer routes will have a shorter mandatory service span compared to shorter routes like the SL4/SL5. If a route exceeds 30 minutes from its outer terminal to the inner terminal, span of service will decrease, and shorter routes now must have a longer service hours, so the SL4/SL5 now get more service hours required (that it deserves) due to it being a short route.
Time | OLD 2021 Standard - required span of service - SDP
(Route 57) | NEW 2024 Standard - required span of service - SDP
(Route 57) | OLD 2021 Standard - required span of service - SDP
(SL4/SL5) | NEW 2024 Standard - required span of service - SDP
(SL4/SL5) |
---|
Depart route origin (AM inbound) | 5:26 a.m. Watertown Yard | 5:28 a.m. - Watertown Yard | 5:44 a.m. - Nubian Square | 5:26 a.m. - Nubian Square |
Arrive route destination (AM inbound) | 5:58 a.m. - Kenmore | 6:02 a.m. - Kenmore | 5:58 a.m. - Downtown | 5:40 a.m. - Downtown |
Depart route origin (PM outbound) | 12:02 a.m. - Kenmore | 11:58 p.m. - Kenmore | 12:03 a.m. - Downtown | 12:20 a.m. - Downtown |
Arrive route destination (PM outbound) | 12:34 a.m. - Watertown Yard | 12:31 a.m. - Watertown Yard | 12:17 a.m. - Nubian Square | 12:34 a.m. - Nubian Square |
By looking at this table above you can see how the SL4/SL5 are now required to run for an extra half hour at the start and the end of the day due to the new SDP standard. Whereas the horrendously long 57 gets a few minutes trimmed from its mandatory required service span due to the length of the route.