San Antonio in context: Street-network sprawl trends

San Antonio in context

2.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
San AntonioTexas (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with San Antonio plotted against Texas and United States. The SNDi of new construction in San Antonio rose steadily, compared to Texas which rose steadily and United States which peaked in 1991-2005. Most recently, San Antonio's incremental SNDi rose from 4.7 to 4.92 between 1991-2005 and 2006-2020. In terms of the aggregate network, San Antonio ranked 22nd out of 42 cities in Texas and 151st out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
4.92
Rank in United States
245th of 333
Rank in Texas
35th of 42

Entire Network (Aggregate)

SNDi value
3.1
Rank in United States
151st of 333
Rank in Texas
22nd of 42

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
San AntonioAmritsarAngeles

In new street additions, San Antonio and Amritsar both built increasingly disconnected streets over time, while Angeles fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend.