last run (of a retiring train)
Used for the final scheduled service of a train, bus, or other vehicle that is being retired from service. Often used in news and by railway fans.
引退する新幹線のラストランを見に行った。
I went to see the last run of the retiring Shinkansen.
last race; retirement race
Refers to the final race of an athlete, horse, or vehicle before retirement. Common in sports and motorsports contexts.
彼はラストランで優勝して引退した。
He won his last race and retired.
Wasei-eigo (Japanese-made English) from 'last' + 'run'.