Friday, August 11, 2006

How reliable was the Met?

Train Reliability Statistics 1983 - 1998

Source: MTA/PTC Annual Reports

Rpt Yr | % OT(i) | % OT(ii) | % Canc(iii) | % Canc (iv)
1983 ------ 93 ---------- ? ----------- ? ------------ ?
1984
1985-6 --- 87.8 ------ 84.1 -------- 3.7 -------- 6.0
1987 ------ 92 -------- 86 ---------- 2.8 -------- 3.8
1988 ----- 92.1 ------ 90.2 --------- 2.5 -------- 4.1
1989 ----- 92.1 ------ 86.4 --------- 2.4 -------- 5.2
1990 ----- 88.3 ------ 85.2 --------- 6.3 -------- 7.6
1991
1992
1993
1994 ----- 92.3 -------- ? ---------- 0.3 --------- ?
1995 ----- 92.3 ------ 86.7 --------- 0.5 --------- ?
1996 ----- 93.3 ------ 89.5 --------- 0.5 --------- ?
1997 ----- 94.8 ------ 92.4 --------- 0.9 --------- ?
1998 ----- 93.7 ------ 90.8 --------- 1.4 --------- ?

(i) Percent of trains on time to five minutes (all day)
(ii)Percent of trains on time to five minutes (peak periods)
(iii) Percent of trains cancelled (all day)
(iv) Percent of trains cancelled (peak periods)

General trends

- The long-term average for on-time running is around 93% with few variations.
- Cancellations and service disruptions declined during the late 1980s but increased greatly around 1990.
- There were unusually low cancellation rates in the 1994 - 1996 period. Subsequent years showed increases, but they remained below their late 1980s levels.
- Current stats are here. These indicate on-time is running at the long-term average and retention of the early 1990s gains in service reliability.

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