Revision of Weekend-Car Scheme in Singapore

Singapore revised its weekend-car scheme recently with the intention of encouraging more car users to switch from the normal to the weekend-car scheme. The relevant authority believes that the new scheme can reduce traffic if implemented successfully. My question is if the new weekend-car scheme appeals so much to people, wouldn’t it also encourage non-owners to consider owning private cars? Under such situation, wouldn’t the scheme result in more crowded roads instead?