Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Yio Chu Kang Int → Upp East Coast Ter | 05:35 | 23:30 | 9–10 min | 8–13 min | 10–13 min | 13–18 min |
| Upp East Coast Ter → Yio Chu Kang Int | 05:30 | 23:15 | 9–13 min | 8–12 min | 9–10 min | 14–17 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.