CBS News Boston reports, Massachusetts DOT announced yesterday that the Sumner Tunnel will close to traffic from July 5 until August 5, with additional weekend closures to follow. The closures are necessary for Phase 2 of the crucial artery’s restoration. Last year, a full closure lasted two months straight. The project is expected to extend the century-old tunnel’s lifespan by 50 years. To help mitigate the impact on traffic and commuters, tolls at the Tobin Bridge and Ted Williams Tunnel will be discounted for drivers registered with a resident discount program, and certain transit routes also will be discounted.