During temporary construction and track work on the outer section of the line and during severe weather conditions, Orient Heights is sometimes used as the terminus, as its busways can accommodate the replacement bus service. From February 1 to December 16, 1981, Orient Heights–Wonderland buses operated on Sundays due to budget cuts. From June 25, 1994 to June 24, 1995, Orient Heights was the terminus at all times to permit reconstruction of the outer stations as part of the Blue Line Modernization Program.