Three State College streets will be converted to one-way under a pilot program aimed at increasing on-street parking spaces and loading zones on the eastern side of downtown. Borough Council on Monday approved a plan that will make the 100 blocks of Hiester Street, Sowers Street and Hetzel Street one-way during the sixth-month pilot beginning in August. Hiester Street will be one-way northbound (toward East College Avenue), Sowers Street would b…