1951 House Bill 2552. Resolve Authorizing The Metropolitan District Commission To Make An Investigation And Study Relative To The Advisability Of Improving Pleasure Bay In The South Boston District Of The City Of Boston, And The Construction Of An Overpass, Underpass Of Traffic Circle At The Somerville-Arlington And Cambridge-Arlington Lines, The Erection Of Waiting Rooms In The Mattapan And Fields Corner Districts Of Boston And Certain Related Matters.