Urban geography: access and uneven change
Connect urban growth, transport access and evidence about who benefits from change.
Explain growth and its geography
Urban population can increase through natural increase and migration. Reclassification and changing boundaries can also affect a recorded total. Distinguish urbanisation, the increasing share living in urban areas, from growth in a city’s population.
Jobs, housing and services influence where people live. A citywide average can conceal large differences in water access, income and journey time among neighbourhoods.
Worked example
A fictional country has 12m urban residents out of 30m people: 40%. Later it has 15m out of 40m: 37.5%. Its urban population grew, but its urban share fell.
Common mistake: An increase in the number of urban residents does not always mean a higher urban percentage.
Measure access to opportunities
Mobility describes movement; accessibility concerns reaching opportunities such as work, education and healthcare. Faster travel can help, but fares, routes, reliability and the distribution of destinations also matter.
Assess who uses a new service and who remains outside it. A project’s beneficiary result cannot automatically describe every resident.
Worked example
A fictional journey costs £2 before an intervention and £1.40 afterwards. Reduction = £0.60; percentage reduction = 0.60 ÷ 2 × 100 = 30%. The saving concerns that journey, not every household’s transport spending.
Common mistake: A shorter route does not guarantee better access if its fare is unaffordable or services are infrequent.
Evaluate change without losing the people
Regeneration can alter land use, housing, employment and public space. Record the initial conditions and compare changes over a meaningful period.
Use several measures and consider distribution. Rising property values can accompany investment while making housing less affordable for some residents. A before-and-after association needs caution about other causes.
Worked example
In a fictional survey, 60 of 100 respondents before a project and 80 of 100 afterwards report good access. The change is 20 percentage points, or a 33.3% relative increase. Different survey samples may limit the comparison.
Common mistake: A favourable average does not prove all groups benefited or that the project caused the entire change.
Try a fresh resource
Choropleth maps
The shading represents a percentage of households, not a total. Class boundaries are lower-inclusive and upper-exclusive.
| District | Reported damage (%) | Households |
|---|---|---|
| A | 7 | 1000 |
| B | 11 | 500 |
| C | 25 | 500 |
| D | 31 | 100 |
On a small screen, scroll the diagram sideways to see the full resource.
Resource description
A–D use these non-overlapping classes: 0 to less than 10%; 10 to less than 20%; 20 to less than 30%; 30 to less than 40%. A has 1,000 households and D has 100 households.
Explore the process
A settlement flood-risk decision
Use sourced case evidence
- Bus rapid transit in Lagos
- Bristol’s clean air zone
- Nigeria: growth and household outcomes
Bus rapid transit in Lagos · Bristol’s clean air zone · Nigeria: growth and household outcomes
Read further
Primary-source explanation · urban access · regeneration evidence · development measures