Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Bishan Int → Bt Merah Int | 06:00 | 23:30 | 8–10 min | 10–18 min | 13–15 min | 15–16 min |
| Bt Merah Int → Bishan Int | 05:45 | 24:00 | 11–15 min | 12–16 min | 12–13 min | 15–17 min |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.