The Long Island Rail Road was on or close to schedule early Friday afternoon after "slip-slide," a slippery rail condition caused by fallen leaves, created scattered delays during the morning commute.

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The condition, caused by "crushed leaves on the rails" that the railroad said leave an "oily residue" buildup on rail surfaces, forced some trains to operate at slower-than-normal speeds.

In an online explanation, the railroad said: "One thing you will notice is that under extreme conditions, we reduce speeds through problem areas out of concern for your safety. While this may result in a slight delay to your service, it ensures a safer operation while also preventing a greater delay because of wheel damage."