Auburn in context: Street-network sprawl trends

Auburn in context

3.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
3.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
AuburnWashington (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Auburn plotted against Washington and United States. The SNDi of new construction in Auburn peaked in 1976-1990, compared to Washington which peaked in 1976-1990 and United States which peaked in 1991-2005. Most recently, Auburn's incremental SNDi fell from 5.41 to 4.96 between 1991-2005 and 2006-2020. In terms of the aggregate network, Auburn ranked 8th out of 8 cities in Washington and 269th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
4.96
Rank in United States
249th of 333
Rank in Washington
5th of 8

Entire Network (Aggregate)

SNDi value
4.23
Rank in United States
269th of 333
Rank in Washington
8th of 8

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
AuburnSongyang CountyTangub [Tubod]

In new street additions, Auburn and Songyang County both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Tangub [Tubod] built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Auburn and Songyang County both became progressively more disconnected, while Tangub [Tubod] became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Auburn and Tangub [Tubod] have been converging in their street-network character since 1975.