it is ridiculously expensive to drive in Singapore. The saying is always that the license to drive a car in Singapore can cost twice what you paid for the car itself. As a result, driving is an absolute luxury. For its population of 5.6 million, there are only 600,000 cars licensed to drive on Singaporean roads[1]. Even if all of those cars started running on electricity it would be a drop in the ocean compared to the ~ 68,100,000 tons of oil SG exports[2].

[1] https://money.cnn.com/2017/10/24/news/singapore-car-numbers-... [2] https://en.wikipedia.org/wiki/Oil_industry_in_Singapore