Why is it that whenever I'm in a hurry, the only trams that come by are not in service?

How to say “Why is it that whenever I'm in a hurry, the only trams that come by are not in service?” in Japanese

In Japanese

急(いそ)いでるときに限(かぎ)って、来(く)る路面電車(ろめんでんしゃ)がみんな回送(かいそう)なんだよね。

Isoideru toki ni kagitte, kuru romen densha ga minna kaisō na n da yo ne.

Why is it that whenever I'm in a hurry, the only trams that come by are not in service? in other languages