Layton in context: Street-network sprawl trends

Layton in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
LaytonUtah (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Layton plotted against Utah and United States. The SNDi of new construction in Layton rose steadily, compared to Utah which peaked in 1991-2005 and United States which peaked in 1991-2005. Most recently, Layton's incremental SNDi rose from 3.76 to 4.12 between 1991-2005 and 2006-2020. In terms of the aggregate network, Layton ranked 5th out of 6 cities in Utah and 219th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
4.12
Rank in United States
163rd of 333
Rank in Utah
5th of 6

Entire Network (Aggregate)

SNDi value
3.64
Rank in United States
219th of 333
Rank in Utah
5th of 6

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

What about similarly populated cities?

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
LaytonNantou CityStavanger

In new street additions, Layton built increasingly disconnected streets over time, while Nantou City fluctuated in its street-construction patterns and Stavanger built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Layton and Nantou City both became progressively more disconnected, while Stavanger grew more disconnected from 1975 through 1991-2005, then improved.