Patrick signs transportation reform bill

BOSTON - Gov. Deval Patrick has signed a sweeping transportation reform bill overhauling the state’s road, bridge and commuter systems.

The new law eliminates the Massachusetts Turnpike Authority, but leaves intact Massport and the Massachusetts Bay Transportation Authority.

Nearly all other state transportation functions would be consolidated under a new Massachusetts Department of Transportation.

By signing the bill, Patrick hopes to avoid a proposed July 1 toll hike even as he all but assures a 25 percent increase in the state sales tax.

The sales tax increase is included in a state budget plan Patrick plans to sign on Monday.

Patrick had threatened to veto the sales tax unless lawmakers first approved three reform bills, including the transportation bill.