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GCSE Geography · key term
A build-up of vehicles that slows traffic because demand for road space exceeds the road's capacity.
Used by AQA and Edexcel
Paper 2
Revise: Urban SustainabilityTraffic congestion develops when too many vehicles compete for limited road space. It causes delays and stress, while congested traffic contributes to pollution. Urban transport strategies aim to reduce the number of car journeys, especially at busy times and in crowded city centres.
Paper 1
A situation in which traffic demand exceeds road capacity, causing slow movement and queues.
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If demand grows faster than road and transport capacity, traffic congestion develops: vehicles move slowly or remain in queues. Longer journeys reduce people's time for work and family life, while delayed deliveries increase costs for businesses.