New Jersey Transit officials say the service won't be able to get all commuters into New York if rail workers strike next weekend.
NJ Transit estimates that a 65-minute commute from Hamilton, Mercer County, or Morristown to New York City would take well over two hours via bus and PATH train.
About 105,000 people commute into New York via trains, either on NJ Transit or in combination with PATH.
NJ Transit interim executive director Dennis Martin said Thursday beefed-up bus service, ferry and light rail service will accommodate a maximum of about 40,000 people.
Martin said five park-and-ride lots will be opened up to first-come, first-served parking. Buses would leave from MetLife Stadium, the PNC Arts Center, Hamilton train station, Metropark and Ramsey
PATH also is expected to extend peak service rail operations.