Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Hougang Ctrl Int → Kent Ridge Ter | 05:45 | 23:00 | 7–12 min | 5–16 min | 8–10 min | 14–17 min |
| Kent Ridge Ter → Hougang Ctrl Int | 06:15 | 23:00 | 8–13 min | 6–16 min | 6–9 min | 10–20 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.