There used to be trains with seats that you could fold up during rush hour on the Yamanote Line in Tokyo.
この場合、次のような言い方ができますよ。
ーThere used to be trains with seats that you could fold up during rush hour on the Yamanote Line in Tokyo.
「以前、東京の山手線にはラッシュアワー時に折りたためる座席のある電車があった」
to fold up「折りたたむ」
during rush hour「ラッシュアワーの間」
ご参考まで!