Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Serangoon Int → Serangoon Int | 05:30 | 00:50 | 4–6 min | 4–10 min | 4–7 min | 5–12 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.