The LIRR recently released the latest edition of totally reliable, self-reported On-Time Percentage figures, and for June 2013, the on-time percentage was up 1.2% over last year.
For June 2013, the LIRR scored a 93.8% On-Time Percentage. As always, a train is considered "on-time" if it arrives at its final destination within 5 minutes and 59 seconds of its scheduled arrival time.
Below is a branch-by-branch breakdown of June OTP:
For June 2013, the Montauk Branch scored the lowest OTP, coming in at 88.5%. Most of these delay minutes can be contributed to the rough weekends the Summer Hamptons services expericnce (see Mending the Montauk Branch Delay Mess Part 1 and Part 2). Only 88.3% of the Motnauk Branch's evening peak trains arrived on time in June while only 88.8% of off-peak and weekend trains came when expected.
Aside from the Montauk Branch, the Port Jefferson Branch also had a pretty poor OTP in the month of June. Coming in a t 89.7%, the Port Jefferson Branch is consistently one of the lowest scoring branches, most usually due to equipment problems with diesel sets (and replacements are never someplace close). Note that electric trains that begin or end their run at Hicksville or Huntington are not factored into this figure.
The single-lowest scoring period for this month goes to the Oyster Bay Branch in the PM peak. PM Peak Oyster Bay trains could have been delayed by scheduled trackwork between Oyster Bay and Locust Valley running late, but other than that there is no one factor that delays the trains almost 20% of the time.
The Far Rockaway Branch, on the other hand, had the railroad's best OTP this marking period with 97.5% of its trains arriving "on time." Between running to two relatively quiet terminals (Far Rockaway and Atlantic Terminal) and running on a branch with a relatively low top speed and lots of padding, the Far Rockaway Branch is consistently one of the best performers on the railroad.
The railroad's two other small branches, the Hempstead and West Hempstead branches, also performed exceptionally, scoring 97% each for June. I guess with less territory to cover and less things to go wrong the OTP numbers stay quite high.
Service in the month of June this year was most notably impacted by the June 17th derailment of a Hempstead Branch train outside Penn Station and the ensuing chaos--but I bet most of those trains got OTP waivers (gotta keep those OTP numbers high somehow).
But as always, with a grace period of nearly six minutes, one wonders how the railroad doesn't have a 100% OTP after all!