By March 31, 1939, the twentieth contract for the system was let, constructing a new bridge for the Grand Central Parkway to cross over Winchester Boulevard and westbound Grand Central traffic over the Cross Island Parkway. On June 13, bids for construction of the new interchange between the Laurelton Parkway, Southern State Parkway and construction of the new parkway between Linden Boulevard and 129th Avenue. Landscaping of the new parkway began around September, with the portion between the Creedmore State Hospital and Laurel ton Parkway being given for topsoiling and gardening for the new parkway, including humus, soil, trees, shrubs and vines. By December, 92% of the landscaping contracts had been announced, with the recent section between the Grand Central Parkway and Fort Totten.