I heard from a friend in Brunei that their country encourages car pooling to reduce carbon emission. They want low carbon output. Personally this is not feasible. You cannot get anyway in Brunei without a car, the public transport is not ready.
People are rich there. The cars are cheap and the tax is low. Practically, everyone I know in Brunei own at least one or two cars.
A solution: The government must step in to reduce the cars. Just like Singapore, they have COE, ERP and god knows what is next. :> Time to learn from your fellow ASEAN Member.