Norwich in context: Street-network sprawl trends

Norwich in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
NorwichEngland (Region)United Kingdom (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Norwich plotted against England and United Kingdom. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Norwich's incremental SNDi fell from 3.82 to 3.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, Norwich ranked 18th out of 124 cities in England and 21st out of 143 in United Kingdom as of 2020.

New Street Additions (2006–2020)

SNDi value
3.46
Rank in United Kingdom
25th of 143
Rank in England
21st of 124

Entire Network (Aggregate)

SNDi value
3.05
Rank in United Kingdom
21st of 143
Rank in England
18th of 124

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
NorwichChapecoBeng

While Chapecó and Beng both built increasingly disconnected streets over time, Norwich built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Norwich and Chapecó have been converging in their street-network character since 1975.