Connecticut received a $10 million grant under the federal Transportation Investment Generating Economic Recovery, or TIGER, program to construct a second platform at New Haven's State Street Station.
State officials say the project will minimize delays and accommodate an increase in service under the New Haven-Hartford-Springfield rail program.
The station, about a mile northeast of the city's main Union Station, services Shore Line East and Metro-North Railroad's New Haven line.
Under the current track configuration, these trains need to cross over two to three Northeast Corridor main-line tracks to reach the existing platform. Officials say the addition of a second platform will eliminate many of the cross-over movements.
"We are making long-overdue, strategic choices to improve Connecticut's transportation system in a way that encourages economic growth and job creation," Gov. Dannel Malloy said in a statement on Sept. 3.
Fitch Ratings and Standard & Poor's rate Connecticut's general obligation bonds AA, while Moody's Investors Service assigns an Aa3 rating.