The LIRR's Ronkonkoma branch had scattered delays at midday Friday due to signal trouble near Central Islip, the railroad said.
The branch previously had 20- to 30-minute delays in both directions. In the morning, that branch and two others were running on or close to schedule after switch trouble near Mineola caused delays averaging 10 to 15 minutes, the railroad said.
The switch trouble affected the Ronkonkoma, Port Jefferson and Oyster Bay branches, the Long Island Rail Road said in a service advisory about 8 a.m. The LIRR reported some individual trains were delayed up to 45 minutes. Service was back to normal about 10 a.m., the railroad said.
The Mineola switch trouble started just after 8 a.m., an LIRR spokeswoman said. By about 8:30 a.m., crews worked on the scene, the switch operated again and trains moved through the area.
There were also a handful of delays on the Babylon and Montauk branches as some eastbound trains were held at Jamaica Station until the switch trouble was resolved, the railroad said.
The Friday morning delays were the latest in a week of cancellations and service issues.
During the Monday morning rush, two fatal train strikes caused delays and cancellations. Tuesday and Wednesday saw issues from switch problems in Central Islip, a fire at a New Hyde Park electrical substation and a power outage due to a suspected lightning strike.