Workers pour the concrete for the final stretch of streetcar tracks on Peachtree Street, at Auburn and Broad, which will complete the system’s 2.7-mile rail loop. Construction of the guideway began on March 20, 2013 at Edgewood Avenue and Jackson Street. By early May, they plan to start doing test-runs with the Streetcar. Peachtree Street should be open by mid- next week. BOB ANDRES / BANDRES@AJC.COM