Sioux Falls in context: Street-network sprawl trends

Sioux Falls in context

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
Sioux FallsSouth Dakota (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sioux Falls plotted against South Dakota and United States. The SNDi of new construction in Sioux Falls rose steadily, compared to South Dakota which rose steadily and United States which peaked in 1991-2005. Most recently, Sioux Falls's incremental SNDi rose from 2.96 to 3.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sioux Falls ranked 1st out of 1 cities in South Dakota and 25th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
3.63
Rank in United States
97th of 333
Rank in South Dakota
1st of 1

Entire Network (Aggregate)

SNDi value
1.87
Rank in United States
25th of 333
Rank in South Dakota
1st of 1

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
Sioux FallsChaukBelaganj

In new street additions, Sioux Falls built increasingly disconnected streets over time, while Chauk built increasingly disconnected streets from 1975 through 1976-1990, then improved and Belaganj fluctuated in its street-construction patterns. For the full network, Sioux Falls and Chauk both became progressively more disconnected, while Belaganj fluctuated in connectivity.