PROVIDENCE, R.I. — A new state-commissioned study says that Governor Raimondo's toll-financed highway repair proposal would boost state economic activity by more than a half-billion dollars and create 6,487 new jobs over the next decade. Regional Economic Models Inc. of Massachusetts, hired to address economic concerns about tolling tractor trailers, concluded that as a result of Raimondo's "RhodeWorks" construction plan, [...]