Amtrak workers are threatening to strike at the end of the month, which could mean trouble for thousands of Long Island Rail Road commuters.

LIRR Unions General Chairman Anthony Simon says the trains won?t go into Penn Station if the workers strike so that picket lines will not be crossed. Simon, who represents 5,400 LIRR union workers, says he will insist on terminating all trains in Queens or Brooklyn if a strike goes into effect.

LIRR commuters would only be taken as far as Jamaica or Woodside stations.

LIRR President Helena Williams says if that is the case, she would work hard to coordinate with New York City Transit to get passengers where they need to go. The LIRR says it will issue printed contingency travel plans in the next two weeks.

Some say a strike would also mean increased traffic on Long Island roads.

Amtrak's unions say a strike could happen as early as midnight Jan. 30.