Shuttle 21: Serangoon—Punggol Shuttle Bus Service

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Page 1: Shuttle 21 (Apr 2021) Route Information
Page 3: Shuttle 21 (Nov 2019) Route Information
Page 4: Shuttle 21 (Jan – Mar 2019 / Jul 2019) Route Information

One thought on “Shuttle 21: Serangoon—Punggol Shuttle Bus Service

  • 13 August 2019 at 3:12 PM
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    NEL operated by SBS Transit, right? Why does the route also operates SMRT?

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