Hi Pleh, non-commercial carpooling trips are allowed among friends or colleagues if two people's prevailing permissible group size is adhered to. For instance, if a group of colleagues is travelling together, they must split into groups of not more than two.

More details can be found here: https://www.motorist.sg/article/876/lta-heightens-safe-distancing-measurements-for-taxi-and-private-hire-sectors