Shaker Heights Rapid Transit line, necessitating split platforms with low-level sections (for Shaker Heights rapid transit cars) and high-level sections (for CTS rapid transit cars). Greater Cleveland Regional Transit Authority By the 1970s the City of Shaker Heights was struggling to maintain the Shaker Heights Rapid Transit and in Cleveland, CTS was facing financial problems with its rapid transit and bus system. Significant federal money was available, but only if a regional transit system was formed. In 1974, the Greater Cleveland Regional Transit Authority (RTA) was organized to take over the municipal transit system in Cleveland and others throughout Cuyahoga County. Voters approved a county-wide sales tax increase to help subsidize the transit system and RTA officially took over the Shaker Heights Rapid Transit lines on July 14, 1975. On September 30, 1979, RTA adopted a new designation for the rapid transit lines. The Airport-Windermere Line became the Red Line, while the Shaker Rapid Transit lines (Shaker and Van Aken) became the Green and Blue Lines. In 1981, RTA undertook a complete renovation of the Blue Line, with new track, ballast, poles and overhead wiring. Existing station shelters were demolished and new shelters were constructed. The project necessitated closing the Blue Line east of Shaker Square for most of the summer of 1981, with substitute bus shuttles and single-tracking along the remainder of the line from East 55th Street to Shaker Square. To run on the renovated line, a fleet of new LRVs were purchased from an Italian firm, Breda Costruzioni Ferroviarie, to replace the aging PCC cars. The new line was dedicated on October 30, 1981. Schedule Blue and Green Line trains operate from approximately 3:40 a.m. to 1:00 a.m. daily. On weekdays, each line operates every 10 minutes during rush hour and every 30 minutes at other times. Service between Tower City and Shaker Square operates every 5 minutes during rush hour and every 15 minutes at other times. Service on the Waterfront Line is limited to approximately every three westbound trains from 6:35 a.m. to 8:50 a.m. and again from 3:35 p.m. through 7:20 p.m. Between 8:50 a.m. and 3:35 p.m. and again between 7:20 p.m. and 10:20 p.m., all westbound trains travel along the Waterfront Line. No Waterfront Line service is provided between 10:45 p.m. and 6:35 a.m. On weekends, each line operates every 30 minutes. Service between Tower City and Shaker Square operates every 15