Service 811: TIB1046U and SMB3121A bunch along Yishun Avenue 5
while on Service 858 towards Woodlands
Service 858: SMB1383Z caught up with SMB3122Y at Yishun Avenue
2. In the end, SMB1383Z took the lead and SMB3122Y followed behind
SMB1383Z all the way to Woodlands Bus Interchange
Yesterday also saw many buses bunching along AMK ST 62