NEWARK - (AP) - A new study says a $9 billion rail tunnelwould cut the commuting time between New Jersey and New York City.

U.S. Sen. Frank Lautenberg announced the results of the RegionalPlan Association study at Newark's Penn Station on Thursday.

The group says the tunnel would increase NJ Transit's on-timeperformance and drive economic growth.

New Jersey Gov. Chris Christie killed the project because ofcost overruns. But the Republican gave it a two-week reprieve aftermeeting with U.S. Transportation Secretary Ray LaHood on Friday.

Lautenberg helped secure $3 billion in federal funding for thetunnel.

The Democrat has met with an undisclosed major financial firm todiscuss private funding to keep the project on track.

More than half a billion dollars have been spent so far.