Cahill calls for turnpike overhaul

Budget watchdog Michael Widmer, president of the Massachusetts Taxpayers Foundation, also blasted the administration's plan.

"This is one of the most irresponsible proposals I have seen seriously considered by the Legislature in my 16 years," said Widmer, whose organization is backed by business. "We are just heading off a cliff, Thelma and Louise, with a smile on our face."

Widmer called for a gas-tax increase and new tolls to help the Turnpike Authority meet the terms of its Big Dig-related debts.