On February 29, 1968, the MCTA published a 56-page report for Governor Rockefeller, and in it, proposed several subway and railroad improvements under the name "Metropolitan Transportation, a Program for Action" (alternatively called the "Grand Design"). The city had already intended to build subway extensions in all four boroughs so that most riders would need at most one transfer to get to their destination. The Program for Action also called for upgrades to the Penn Central railroads as well as to area airports. The Program for Action was put forward simultaneously with other development and transportation plans under the administration of Mayor Lindsay. This included Lindsay's Linear City plan for housing and educational facilities, and the projected construction of several Interstate Highways, many of which had originally been proposed by Robert Moses.