Duncanville in context: Street-network sprawl trends

Duncanville in context

1.82.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
DuncanvilleTexas (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Duncanville plotted against Texas and United States. The SNDi of new construction in Duncanville followed a zig-zag trend with an overall increase, compared to Texas which rose steadily and United States which peaked in 1991-2005. Most recently, Duncanville's incremental SNDi rose from 2.14 to 2.51 between 1991-2005 and 2006-2020. In terms of the aggregate network, Duncanville ranked 11th out of 42 cities in Texas and 70th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
2.51
Rank in United States
15th of 333
Rank in Texas
4th of 42

Entire Network (Aggregate)

SNDi value
2.29
Rank in United States
70th of 333
Rank in Texas
11th of 42

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
DuncanvilleSam SonPangkajene

Duncanville, Sầm Sơn, and Pangkajene all fluctuated in its street-construction patterns in new street construction. For the full network, Duncanville fluctuated in connectivity, while Sầm Sơn grew more disconnected from 1975 through 1976-1990, then improved and Pangkajene became progressively more disconnected. Duncanville and Pangkajene have been converging in their street-network character since 1975.