what was the date of the first speed recorded that was over 450 km/h?
12 December 1979
Speed [km/h (mph)] Train Type Location Date Comments
504 (313.2) ML-500 Maglev Miyazaki Maglev Test Track 12 December 1979
517 (321.2) ML-500 Maglev Miyazaki Maglev Test Track 21 December 1979
352.4 (219.0) MLU001 Maglev Miyazaki Maglev Test Track January 1986 Three-car train set
405.3 (251.8) MLU001 Maglev Miyazaki Maglev Test Track January 1987 Two-car train set
431 (267.8) MLU002N Maglev Miyazaki Maglev Test Track February 1994 Single-car
550 (341.8) MLX01 Maglev Yamanashi Maglev Test Line 24 December 1997 Three-car train set
548 (340.5) MLX01 Maglev Yamanashi Maglev Test Line 18 March 1999 Five-car train set
csv/204-csv/821.tsv