The Connecticut Bond Commission is expected to approve $260 million to help pay for the improvements needed for high-speed trains running through the state and western Massachusetts, local media report.

The commission, chaired by Gov. M. Jodi Rell, is scheduled to meet August 17 at the Legislative Office Building and vote to borrow the money for the New Haven-Hartford-Springfield rail line.

The $260 million is Connecticut's matching portion for a $220-million federal grant that's being sought. The state filed its application Aug. 6.

The money will cover station upgrades, new stations and pay to double-track the remaining 25 miles of the 62-mile line.

Officials hope to bring high-speed, intercity rail service within five years.