What to Know Signal problems caused delays for subway riders Thursday morning, and PATH had signal issues as well

It was the fourth morning in a row of widespread disruptions to multiple transit systems around the region

Most of the rail disruptions this month were unrelated to the repair work at New York Penn Station

The Port Authority of New York and New Jersey has approved spending $134.5 million to replace two aging substations that help power PATH trains.

Substation 7 in Jersey City and Substation 9 in Harrison sustained extensive damage during Sandy in 2012. They power trains traveling between Newark and Jersey City's Journal Square.

The new substations will be designed to sit several feet above flood-prone areas.

Work on the projects is scheduled to begin later this year and the Port Authority says it will have no impact on daily PATH service.