first metro line built on the European mainland is the Földalatti
Vasút (FAV) which opened its doors in 1896. This line was,
from the start, a big transportation success, but had to wait
for its extension until 1973. That year, the line was closed down
for six months, renovated and extended to a total of 4.9 kilometres.
Today, the Budapest system consists of three lines. Line 2 consists
of 10.1 kilometres of track and opened its stations in 1970 respectively
1972. Line 3 is the newest line. It has a total length of 12.5
kilometres, the first part opened in 1976, and then gradually
expanded in 1980, 1981, 1984 and 1990 respectively. The Budapest
system has come to a total length of 31.7 kilometres of track,
42 stations, and 562 vehicles.
Source: López, M.J.J., Crime Prevention
Guidelines for the Construction & Management of Metro Systems,
Den Haag: RCM-advies 1996, pg. 18-19.