Service on Metro-North's Hudson line into Grand Central Terminal returned to normal just before the Tuesday evening commute, Metro-North officials said.

Severed signal cables in Yonkers snarled Monday's evening commute. While crews worked overnight to resume peak-hour trains to Grand Central as scheduled, riders on outbound routes were experiencing delays of up to 20 minutes during the morning, railroad officials said.

advertisement | advertise on newsday

Crews restored the signals on the outbound express track at 12:45 p.m. Tuesday and the final outbound track was also repaired by 2:15 p.m. Service returned to normal at 3:30 p.m., officials said.

Metro-North said a contractor working for an outside firm on property adjacent to the Glenwood station was working without authorization on the Metro-North site and accidentally severed signal cables that transmit the station's public address system and two 2,300-volt power cables with a backhoe just before 4 p.m. Monday. The mishap affected all four tracks on the Hudson line and caused delays of up to 30 minutes both ways throughout the Monday afternoon rush and into the evening, officials said.

Service was normal on the Harlem and New Haven lines Tuesday afternoon, officials said.