Which monorail used to begin the monorail that is a 3.9 mile long monorail mass transit system?
Mark IV monorail The Mark IV monorail was a design model of straddle-type monorail trains. The design was developed by legendary Disney Imagineer Bob Gurr. Ten trains were built by Martin Marietta in 1969 at the cost of about $7 million USD each and they were used on the Walt Disney World Monorail System between 1971 and 1989 before they were replaced by the Mark VI monorail, although a few lasted until 1991. Sometime between 1991 and 1994 Monorail Coral and Lime (which had been introduced new in 1984) were sold for $3.5 million each, refurbished, and used to begin the Las Vegas Monorail operations. In 2004 Lime and Coral (now the MGM and Bally) were replaced by fully automated Bombardier MVI 4-car trains.
Green Line (Washington Metro) The Green Line is one of the six heavy rail subway lines that make up the Washington Metro rapid transit system in the Washington, D.C., metropolitan area. The Green Line consists of 21 stations, with termini at Branch Avenue and at Greenbelt. The Green Line runs through Prince George's County, Maryland, and the District of Columbia. It was the last line in the original Metrorail plan to be constructed, and is one of three north–south lines through the city of Washington. It shares nine stations with the Yellow Line, one station with the Blue, Silver and Orange lines, and two stations with the Red Line.