O’Fallon in context: Street-network sprawl trends

O'Fallon in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with O’Fallon plotted against Missouri and United States. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, O’Fallon's incremental SNDi fell from 6.78 to 6.09 between 1991-2005 and 2006-2020. In terms of the aggregate network, O’Fallon ranked 4th out of 4 cities in Missouri and 320th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
6.09
Rank in United States
301st of 333
Rank in Missouri
4th of 4

Entire Network (Aggregate)

SNDi value
6.01
Rank in United States
320th of 333
Rank in Missouri
4th of 4

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
O'FallonWanaparthySanta Barbara

In new street additions, O’Fallon and Santa Barbara both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Wanaparthy built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend.