Jacksonville in context: Street-network sprawl trends

Jacksonville in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
JacksonvilleFlorida (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Jacksonville plotted against Florida and United States. The SNDi of new construction in Jacksonville rose steadily, compared to Florida which rose steadily and United States which peaked in 1991-2005. Most recently, Jacksonville's incremental SNDi rose from 5.62 to 6.73 between 1991-2005 and 2006-2020. In terms of the aggregate network, Jacksonville ranked 8th out of 27 cities in Florida and 217th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
6.73
Rank in United States
318th of 333
Rank in Florida
24th of 27

Entire Network (Aggregate)

SNDi value
3.62
Rank in United States
217th of 333
Rank in Florida
8th of 27

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
JacksonvilleMiddlesbroughXiao Nan

In new street additions, Jacksonville and Middlesbrough both built increasingly disconnected streets over time, while 胶南 fluctuated in its street-construction patterns. For the full network, Jacksonville and Middlesbrough both became progressively more disconnected, while 胶南 fluctuated in connectivity. Notably, Jacksonville had a more connected network than Middlesbrough in 1975 but the two have since reversed their relative ranking.