Band 7 model answer Task 2 · Problem and solution essay

Causes and solutions for city traffic congestion

This is a model answer written to show what a Band 7 response looks like against the marking criteria. It is a worked example, not a graded submission. To see your own band, paste your writing into the free checker.

The prompt

Traffic congestion is becoming a serious problem in many large cities. What are the main causes of this problem, and what solutions can you suggest?

Band 7 model answer (261 words)

Traffic congestion has become a daily frustration in many of the world's largest cities. This essay will examine the main causes of the problem and suggest some practical solutions.

The primary cause of congestion is the sheer number of private cars on the road. As cities grow and incomes rise, more people can afford their own vehicles, and many prefer the comfort and privacy of driving to using crowded public transport. A second cause is poor urban planning. In cities where homes, workplaces and schools are spread far apart, people have little choice but to travel long distances every day, and because most of them commute at the same peak hours, the road network quickly becomes overwhelmed.

There are, however, several measures that could ease the problem. The most effective solution is to invest heavily in reliable public transport, such as metro systems and bus networks. If trains and buses are frequent, clean and affordable, many drivers will happily leave their cars at home. Governments can strengthen this effect by introducing congestion charges in city centres, which make driving more expensive at busy times and push people towards greener alternatives. Better long-term planning also helps, for example by building homes closer to workplaces and improving cycle lanes, so that fewer long car journeys are needed in the first place.

In conclusion, the main causes of urban congestion are the rising number of private cars and poorly planned cities. The problem can be reduced by improving public transport, charging drivers to enter busy areas, and designing cities that keep daily journeys short.

Why this reaches Band 7

  • Task Response

    Both parts of the task are answered: two clear causes and matching solutions, each developed with a short explanation. The solutions address the causes named, which is what lifts a problem and solution essay to Band 7.

  • Coherence and Cohesion

    Causes and solutions sit in their own paragraphs, and linking such as "A second cause" and "The most effective solution" keeps the logic easy to follow.

  • Lexical Resource

    Accurate topic vocabulary such as "private cars", "peak hours", "congestion charges" and "road network".

  • Grammatical Range and Accuracy

    A mix of complex structures and conditionals ("If trains and buses are frequent...") with few errors.

The one fix to reach Band 7

A Band 6 problem and solution essay often lists solutions that do not connect to the causes it gave. The single change that reaches Band 7 is to tie each solution directly to a cause you named, so the essay reads as one joined-up argument.

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