City officials are proposing a project for a deteriorating Providence interchange that could save money and free up 55 acres of land for new development.
The new plan introduced by city planners Monday has been given to the state Department of Transportation as an alternative to rebuilding the 6-10 interchange on its existing footprint at an estimated cost of $400 million.
It would feature an elevated rotary at the end of U.S. Route 6 in the city's Olneyville neighborhood. The rotary, described as a "halo" structure, would replace the ramps that feed traffic between the two expressways and include a connection from state Route 10 north to Route 6 West.
City officials say the estimated cost hasn't been determined. Construction and maintenance costs could be less than the state's current plan.