Problem-Solution Essay Model Answer
Question
Traffic congestion in cities is a growing problem around the world. What are the main causes of this problem and what solutions can you suggest?
Full Essay
Band 7.5 annotated answer
Each paragraph is followed by an examiner note explaining exactly what earns marks.
Introduction
Urban traffic congestion has become one of the defining challenges of modern city management, causing economic losses, environmental damage, and significant reductions in quality of life for millions of commuters. This essay will examine two of the most significant causes of this problem and propose practical solutions that governments and city planners can implement.
'This essay will examine' is acceptable in problem-solution essays as it clearly signals task understanding. The introduction identifies consequences of the problem (economic losses, environmental damage, quality of life) rather than just restating the question — this adds value and signals Task Achievement.
Body Paragraph 1
Two interconnected factors drive the worsening of urban traffic. First, rapid population growth in major cities has far outpaced the development of public transport infrastructure. As more people relocate to urban centres for employment, road networks originally designed for smaller populations become overwhelmed, particularly during peak commuting hours. Second, widespread private car ownership — encouraged by decades of subsidised fuel, inadequate cycling infrastructure, and the social prestige attached to vehicle ownership in many cultures — means that the majority of urban commuters choose personal vehicles even when public alternatives exist. Together, these forces create a self-reinforcing cycle: as roads become more congested, journey times by public transport also increase, making cars appear more attractive despite the congestion they generate.
Two causes are named and explained, and crucially, the interaction between them is articulated in the final sentence ('self-reinforcing cycle'). This analytical link between the two causes is the kind of sophisticated thinking that distinguishes Band 7 from Band 6. The paragraph goes beyond listing to explaining.
Body Paragraph 2
The most effective responses address both causes simultaneously. Investment in rapid, affordable mass transit — metro systems, dedicated bus corridors, and intercity rail — reduces the appeal of private car use by offering a genuinely competitive alternative. Singapore offers a compelling model: by combining world-class public transport with an electronic road pricing system that charges drivers for entering congested zones, the city-state has maintained relatively low traffic levels despite extreme population density. At the individual level, governments can incentivise remote working and flexible scheduling to reduce the concentration of vehicle journeys at peak times, distributing demand more evenly throughout the day.
Solutions are directly linked to the causes identified in Body 1 — this is essential for Task Achievement in problem-solution essays. The Singapore example is two-dimensional (public transport + pricing), making it more persuasive than a single-measure example. 'Distributing demand more evenly' is precise, analytical phrasing.
Conclusion
Traffic congestion will not be resolved through a single measure. Lasting improvement requires simultaneous investment in public transport, demand-management tools such as congestion pricing, and cultural shifts in commuting behaviour. Cities that have adopted this multi-pronged approach demonstrate that the problem, though complex, is not intractable.
The conclusion synthesises the argument rather than simply summarising it. 'Multi-pronged approach' is strong Band 7+ phrasing that shows the ability to categorise. 'Not intractable' is a confident, sophisticated closing — it answers the implicit question of whether the problem can be solved.
Comparison
Band 6 vs Band 7+ introduction
✗ Band 6
“Nowadays, traffic congestion is a big problem in many cities. There are many reasons for this and also some solutions. I will discuss the causes and solutions in this essay.”
✓ Band 7+
“Urban traffic congestion has become one of the defining challenges of modern city management, causing economic losses, environmental damage, and significant reductions in quality of life for millions of commuters. This essay will examine two of the most significant causes of this problem and propose practical solutions that governments and city planners can implement.”
What makes the difference
The Band 6 introduction uses basic vocabulary ('big problem', 'many reasons'), gives no indication of what causes or solutions will be discussed, and announces the essay structure mechanically. The Band 7+ introduction identifies specific consequences, uses academic register throughout, and scopes the response precisely ('two of the most significant causes').
Why it scores Band 7.5
Key strengths of this essay
Causal interaction between the two problems explained ('self-reinforcing cycle') — not just listed
Solutions directly address the causes identified — strong Task Achievement
Singapore example is two-dimensional (transit investment + congestion pricing)
Consistent academic register: 'self-reinforcing cycle', 'incentivise', 'multi-pronged approach', 'intractable'
Other Task 2 model answers