IELTS Writing Task 2: Traffic Congestion (Band 9 Sample)
This "problem and solution" question asks about the causes of worsening traffic congestion in cities and how it might be reduced. A band-9 response identifies clear causes and matching, realistic solutions, developing each fully. Below is a model answer of roughly 285 words, followed by a breakdown of why it scores 9 on all four criteria.
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01 · The task
Traffic congestion is becoming a serious problem in many cities. What do you think are the main causes of this problem, and what measures could be taken to solve it?
02 · Band 9 sample answer
284 words · Band 9Traffic congestion has become one of the most frustrating features of modern city life, costing people hours of wasted time and worsening air quality. This essay will examine the principal causes of the problem before proposing some practical ways of tackling it.
1. The main causes
The root cause is the sheer number of private cars on the roads. As cities have grown wealthier, car ownership has soared, yet road networks — often designed decades ago — simply cannot cope with the volume. This is made worse by a reliance on cars for even short journeys, which stems in part from public transport that is too slow, unreliable or expensive to be an attractive alternative. The result is that roads which were adequate a generation ago are now gridlocked for much of the day.
2. Possible solutions
The most effective solution is to make public transport a genuine alternative to driving. Investing in fast, affordable and frequent buses, trams and trains would persuade many commuters to leave their cars at home. Cities could reinforce this by discouraging car use directly — for example, through congestion charges in the centre, as London has done, or by creating bus lanes and cycle paths. Encouraging remote working and staggered office hours would also spread demand more evenly across the day, easing the rush-hour crush.
In conclusion, urban congestion is driven mainly by excessive car use and inadequate public transport, but it can be significantly reduced through better public transport, sensible restrictions on driving and more flexible working patterns.
03 · Why this scores Band 9
Both parts of the question are answered fully: the causes (too many cars, weak public transport) are developed, and the solutions (better public transport, congestion charges, flexible working) directly address those causes. The clear cause-then-solution mapping is exactly what this essay type requires.
The essay follows the ideal problem-solution shape — introduction, causes, solutions, conclusion — with one clear idea per paragraph and the solutions mirroring the causes. Cohesion is natural — "The root cause is...", "This is made worse by...", "The most effective solution is...", "In conclusion".
Vocabulary is precise and topic-appropriate — "car ownership has soared", "gridlocked", "a genuine alternative", "congestion charges", "the rush-hour crush" — and each solution is expressed with natural collocation rather than vague phrasing.
A wide range is controlled accurately: a relative clause ("road networks, often designed decades ago"), a "which" clause carrying consequence ("roads which were adequate a generation ago are now gridlocked"), and conditional-flavoured suggestions ("Investing in... would persuade many commuters"). The writing stays error-free.
04 · Useful collocations for this task
Tap a phrase to see what it means and how to use it. Natural collocations like these lift your Lexical Resource score.
05 · Frequently asked questions
How do I structure a "causes and solutions" essay?
Give one body paragraph to the causes and one to the solutions, and make sure the solutions clearly address the causes you identified. This model links "too many cars and weak public transport" directly to "invest in public transport and discourage driving".
Do the solutions need to match the causes?
Yes — that link is what pushes the essay to band 9. If you name a cause but propose an unrelated solution, the answer feels disjointed. Every solution here responds to a problem raised in the previous paragraph.
Can I use a real example like London's congestion charge?
Yes. A brief, accurate real-world example ("congestion charges, as London has done") makes a solution concrete and is rewarded under Task Response and Lexical Resource. Keep it short so it supports rather than dominates the point.
How long should the essay be?
At least 250 words; a band-9 answer is usually 260–290. This model is 284 words, enough to develop both the causes and the solutions without padding.
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