singa138138 (SBS Transit) The first stop of the 138 bus route is Mandai Lake Rd - S'Pore Zoo (48131) and the last stop is Ang Mo Kio Ave 8 - Ang Mo Kio Int (54009). 138 (Ang Mo Kio Int) is operational during everyday.Send Message. If you have Telegram, you can contact SINGA138 rh away. rh away.