The first choices transport around neighbourhood. One the reason why bicycles was the first choices was because it was cheaper than owning cars. To own cars in Singapore was expensives, it was not the cars is not affortables by them but to own car you need to buy special cert which cost a lot of moneys.
Secondly, the public transport was super easy and cheap. You can go most every place here by just using public transport, that's why people use their bicycles to reach the mrt station and park there to use the public transport to their workplace.