Line | Route | Operator | Notes |
1 | Groningen Hoofdstation - Groningen Centrum - Groningen Station Noord - Groningen Paddepoel - Groningen Zernike - Groningen P+R Reitdiep | Qbuzz | Mon-Fri during daytime hours, this bus runs through from Groningen P+R Reitdiep to Zuidhorn. |
39 | Groningen - Slaperstil - Aduard - Zuidhorn - Niekerk - Oldekerke - Sebaldeburen - Grootegast - Doezum - Kornhorn - Opende - Surhuisterveen | Qbuzz | |
637 | Zuidhorn - Noordhorn - Grijpskerk - Kommerzijl - Munnekezijl - Zoutkamp | Qbuzz | Rush hours only. |
638 | Zuidhorn - Noordhorn - Niezijl - Grijpskerk - Grootegast | Qbuzz | 1 run during both rush hours only. On Wednesdays, the afternoon rush hour run is replaced by a run at noon. |