Levittown in context: Street-network sprawl trends

Levittown in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
LevittownPennsylvania (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Levittown plotted against Pennsylvania and United States. The SNDi of new construction in Levittown rose steadily, compared to Pennsylvania which rose steadily and United States which peaked in 1991-2005. Most recently, Levittown's incremental SNDi rose from 5.09 to 5.9 between 1991-2005 and 2006-2020. In terms of the aggregate network, Levittown ranked 15th out of 16 cities in Pennsylvania and 211th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
5.9
Rank in United States
296th of 333
Rank in Pennsylvania
14th of 16

Entire Network (Aggregate)

SNDi value
3.58
Rank in United States
211th of 333
Rank in Pennsylvania
15th of 16

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
LevittownDonggouTongcheng

In new street additions, Levittown built increasingly disconnected streets over time, while Donggou fluctuated in its street-construction patterns and Tongcheng fluctuated in its street-construction patterns. For the full network, Levittown and Donggou both became progressively more disconnected, while Tongcheng became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Levittown and Tongcheng have been converging in their street-network character since 1975.