Tulsa in context: Street-network sprawl trends

Tulsa in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
TulsaOklahoma (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tulsa plotted against Oklahoma and United States. The SNDi of new construction in Tulsa rose steadily, compared to Oklahoma which rose steadily and United States which peaked in 1991-2005. Most recently, Tulsa's incremental SNDi rose from 3.72 to 3.86 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tulsa ranked 2nd out of 4 cities in Oklahoma and 122nd out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
3.86
Rank in United States
125th of 333
Rank in Oklahoma
1st of 4

Entire Network (Aggregate)

SNDi value
2.84
Rank in United States
122nd of 333
Rank in Oklahoma
2nd of 4

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

What about similarly populated cities?

1.42.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
TulsaColorado SpringsShashamane

In new street additions, Tulsa built increasingly disconnected streets over time, while Colorado Springs built increasingly disconnected streets from 1975 through 1991-2005, then improved and Shashamane fluctuated in its street-construction patterns. For the full network, Tulsa and Colorado Springs both became progressively more disconnected, while Shashamane fluctuated in connectivity. Tulsa and Colorado Springs have been growing further apart in their street-network character since 1975.