the Red Line, while the Shaker Rapid Transit lines (Shaker and Van Aken) became the Green and Blue Lines. In 1980, RTA undertook a complete renovation of the Green Line, with new track, ballast, poles and overhead wiring. Existing stations were demolished and new stations constructed. The project necessitated closing the Green Line east of Shaker Square for most of the summer of 1980, 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 lines, 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 minutes and all westbound trains from 9:20 a.m. through 10:20 p.m. operate on the Waterfront Line. Rail Replacement Bus During rail shutdowns, RTA uses the replacement bus designation "67R". Green Line shuttle buses run between Tower City and Green Road. Rolling stock The Blue and Green Lines use a fleet of 48 light rail vehicles (LRVs) manufactured by Breda Costruzioni Ferroviarie in 1980 and 1981. Each car is long, high, and wide and is articulated with operator cabs at each end, seating 84 passengers in 42 double transverse seats. The units are numbered 801–848. RTA needs 34 of the cars for regular use, and requires only 17 to operate currently scheduled service. The cars originally had white exteriors with broad orange and red stripes, and an interior finished in earth tones with faux wood paneling and orange and brown vinyl padded seats. With the opening of the Waterfront Line