| The economic cost of poor urban air quality is often underestimated. In 2021, private passenger vehicles accounted for 84% of total urban passenger kilometers, contributing significantly to nitrogen dioxide (NO2NO_2NO2) emissions and particulate matter (PM2.5PM_{2.5}PM2.5). Drivers impose severe health costs on non-road users through cardiovascular diseases, and decrease overall productivity. | 1 |
| Some argue that the solution to urban air pollution is to persuade commuters to switch from private cars to active travel or zero-emission public transport. This might be achieved by penalising high-emission vehicles. However, charging drivers will have limit effectiveness if the cross elasticity of demand between private car use and alternative modes is highly inelastic. | 5 |
| An alternative policy is to subsidise clean transit options. In 2022, local authorities allocated £250 million to segregated bicycle lanes and £800 million to subsidise zero-emission bus services. Cheap public fares and accessible micro-mobility solutions help lower barriers to switching. | 10 |
Despite economic headwinds, cities with municipal light rail systems saw a 14% increase in tram passenger journeys in 2023. A proposed £12 billion green transit expansion program aims to double inner-city rail capacity. However, relying purely on modal shift to reduce emissions has limits: absorbing just 15% of current commuter car journeys would completely overwhelm existing light rail and bus networks. Source: Academic and news reports, 2023
Urban infrastructure must be funded, so the debate centers lock on how we charge transport users. As private vehicles transition to electric power, revenues from fuel duty and vehicle excise duties are projected to collapse. An independent economic research body estimates that replacing this revenue gap would require a near-doubling of standard electricity levies. They suggest local authorities move toward localized charging schemes.
One option is a Workplace Parking Levy (WPL), which charges employers for the parking spaces they provide, incentivizing them to reduce car use. Another solution is an Ultra Low Emission Zone (ULEZ) daily charge, penalizing older, non-compliant vehicles. ULEZ schemes aim to charge road users directly for the external social costs of their emissions.
However, administrative costs vary wildly. Workplace Parking Levies have very low implementation costs (estimated at less than 1.5% of revenue) as employers self-report. In contrast, ULEZ schemes require complex Automatic Number Plate Recognition (ANPR) camera networks, costing up to 12% of total target revenues. Furthermore, fairness remains a significant challenge. Flat-rate daily emission charges act as a regressive tax, disproportionately hitting low-income key workers who cannot afford to purchase modern electric vehicles.
Source: Municipal planning reviews, 2023
Extract B (lines 5 and 6) states that 'the solution to urban air pollution is to persuade commuters to switch from private cars to active travel or zero-emission public transport'.
Using the data and your economic knowledge, assess which is the best policy that the government or local authorities could adopt to reduce vehicle emissions in urban areas.
378 exam-style questions on AQA A Level Economics 1.8 The market mechanism, market failure and government intervention in markets, covering 1.8.1 How markets and prices allocate resources, 1.8.2 The meaning of market failure, 1.8.3 Public goods, private goods and quasi-public goods, 1.8.4 Positive and negative externalities in consumption and production, 1.8.5 Merit and demerit goods, 1.8.6 Market imperfections, 1.8.7 Competition policy (A-level only), 1.8.8 Public ownership, privatisation, regulation and deregulation of markets (A-level only), 1.8.9 Government intervention in markets, and 1.8.10 Government failure. Each one has a worked solution and a mark scheme showing where the marks go.