Effectiveness of Singapore's Policies to Become "Car-Lite"

Question

The desire to attract the best talent and businesses from around the world has prompted Singapore to embrace the challenge to become “car-lite” by 2030. The government uses a spectrum of policies to wean the population off cars and onto a new range of more sustainable transport modes.

Assess the effectiveness of the current policies used by the Singapore government in correcting market failure in the land transport market to become “car-lite”. [25]

Answer

Thesis. Car use in Singapore generates a negative externality — congestion and pollution impose unpriced costs on third parties — while public transport carries a positive externality that the free market under-provides. The government attacks the problem from both sides with policies that control car ownership (the COE), car usage (ERP and petrol tax) and the substitute (public-transport provision and subsidy). This essay argues that no single instrument is sufficient — each corrects only one facet of the failure — but that, implemented together as a holistic package, the policies are reasonably effective in moving Singapore towards “car-lite”, subject to limits set by inelastic, affluence-driven demand and the difficulty of valuing the externality precisely.

The market failure. Driving inflicts an external cost on third parties: congestion delays other road users and pollution harms public health. These costs are unpriced and uncompensated, so the marginal social cost of car use exceeds the marginal private cost, the market over-consumes car travel relative to the social optimum, and a deadweight welfare loss arises from allocative inefficiency. Note that pollution and congestion are the medium through which external costs reach third parties, not the costs themselves.

Controlling ownership — the Certificate of Entitlement (COE). Anyone registering a new vehicle must first obtain a COE, the right to own a car for ten years; lowering the COE quota’s growth rate towards zero caps the car population below the free-market level, which should reduce congestion and pollution and push those who cannot secure a COE towards alternative transport. As an instrument of government intervention, it is effective at fixing the stock of cars. Its limits are twofold. The socially optimal car population is hard to ascertain, so the quota may be mis-set. More fundamentally, the COE is a quota that controls ownership but not usage: having paid a high price for the COE, owners may rationalise driving more to extract value from the sunk cost, so ownership control alone does not curb the congestion externality at the margin.

Controlling usage — ERP and the petrol tax. Electronic Road Pricing functions like a corrective tax: a congestion charge that internalises the external cost, making the driver face the social cost of using a congested road at a congested time, so private cost rises towards social cost and usage falls towards Qs. ERP targets the root of congestion — usage rather than ownership — on a “pay as you use” basis, and distance-based satellite ERP would sharpen this by charging according to actual road use, eliminating the “chasing after the jams” distortion of the fixed-gantry system. The petrol tax of 50–60 cents per litre similarly internalises the pollution externality and discourages driving. The effectiveness limits are that the marginal external cost is intangible and hard to price precisely (so the charge may not equal the external cost), and that ERP can divert congestion to non-charged roads or times. Crucially, demand is price-inelastic given affluent car owners, so usage charges reduce driving only modestly — though the revenue collected is a steady source to fund public-transport alternatives.

Providing the substitute — public-transport improvement and subsidy. Extending the rail network, raising frequency and punctuality, subsidising transport infrastructure, building cycling networks and promoting walking, cycling and Personal Mobility Devices as first- and last-mile solutions all improve the substitutability of public transport for the car, lowering the demand for cars (a high cross-elasticity linkage). Subsidies also internalise the positive externality of public-transport use — fewer cars on the road benefit everyone — correcting its under-provision.

The effectiveness limit here is behavioural. Frequent MRT breakdowns can deter motorists from switching, though renewal and maintenance programmes should rebuild confidence. More tellingly, better public transport mainly deters potential car buyers; it is harder to make existing owners downgrade, given the comfort, convenience and time-saving of driving — and harder still where car ownership signals status. Improving the substitute shifts the margin, but does not by itself dislodge committed drivers.

Evaluation and judgement. Assessing effectiveness against the stated aim — becoming “car-lite” — the decisive point is complementarity. Each policy addresses only one facet: the COE caps ownership but not usage; ERP and the petrol tax price usage but leave the car stock untouched; public-transport provision improves the alternative but cannot compel switching. The shortcomings of one are largely covered by another — ownership control by the COE is reinforced by usage charging through ERP, and both are made tolerable by a credible public-transport substitute — so the package is more effective than the sum of its parts. Effectiveness is real but bounded: the persistent constraint is that car demand in Singapore is price-inelastic because owners are affluent and value the car’s convenience and status, so even well-designed corrective charges shift behaviour only at the margin, and the rise of private-hire services such as Grab means fewer owned cars need not translate into fewer car trips.

On balance, the current policies are effective in correcting the land-transport market failure and advancing the “car-lite” goal because they operate as a coordinated whole, and Singapore’s congestion is comparatively manageable against cities such as Jakarta or Bangkok. The reasoned verdict is that the mix is effective but not complete: continued effectiveness depends on tightening usage-based pricing (distance-based ERP), sustaining public-transport reliability, and confronting the inelastic, status-driven demand that no single instrument can overcome.