A surge in ridership this month has prompted Metro-North Railroad officials to add extra cars to trains on the New Haven Line today.

This holiday season, Metro-North is reporting an overall 27 percent jump in passengers over last December for its three lines east of the Hudson River, including the New Haven Line through southwestern Connecticut.

In response to what is expected to be particularly heavy ridership today -- the last pre-Christmas Saturday before the holiday next Saturday -- the railroad will add to capacity with extra cars on many of its New Haven Line trains, according to railroad officials.

"We are delighted so many customers are enjoying the safety, convenience and comfort of our trains," Metro-North President Howard Permut said in a statement. "We are making these temporary adjustments to our scheduling to accommodate everyone who wants to ride with us."