Two days after two Metro-North Railroad trains collided in Bridgeport, service at stations between New Haven and South North remains suspended.

Westport's two rail depots -- Saugatuck and Greens Farms -- fall into that service "gap," an interruption that as of Sunday is expected to persist indefinitely as the cause of the crash is investigated by the National Transportation Safety Board, then followed by removal of the wrecked M-8 train cars and repairs of the mangled tracks are carried out by Metro-North.

Amtrak, which was forced to shut down all service between New York City and Boston on Friday night and Saturday, as of Sunday had restored limited service between New Haven and Boston, while service between New Haven and New York remains suspended.

As of Sunday morning, there was no indication how long the probe into the Bridgeport crash and repairs could take, but estimates are that it might be weeks.

Commuters are being urged to make alternate travel arrangements as the start of the work week -- and nightmarish commuting conditions -- loom Monday.

Officials, as of Sunday morning, had not announced whether there would be special bus service for rail passengers who normally use the stations in the service blackout zone, or alternatives like car pools.

As of Sunday, here is the status of rail service in the region:

- Reduced, hourly service will operate between South Norwalk Station and Grand Central Terminal.

- Regular service will operate between Stamford and Grand Central Terminal.

- Regular service will be in effect on the New Canaan and Danbury Branches.

- Bus service will be in effect between Waterbury and Bridgeport with no train connections.

- Yankee game-day service will be in effect between Stamford and Yankees-East 153rd St. Station.

Metro-North warns riders to anticipate crowded trains because of the limited schedule.

Amtrak service, meanwhile, continues to be suspended between New York and New Haven, while limited Amtrak service has been restored between New Haven and Boston.

Amtrak officials say there will be a service update Sunday evening.

For METRO-NORTH service updates, go here:

For AMTRAK service updates, go here: