Lafayette in context: Street-network sprawl trends

Lafayette in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lafayette plotted against Louisiana and United States. While Louisiana and United States both peaked in 1991-2005, Lafayette's new street additions peaked in 1991-2005. Most recently, Lafayette's incremental SNDi fell from 4.61 to 4.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lafayette ranked 3rd out of 3 cities in Louisiana and 183rd out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
4.49
Rank in United States
213th of 333
Rank in Louisiana
2nd of 3

Entire Network (Aggregate)

SNDi value
3.39
Rank in United States
183rd of 333
Rank in Louisiana
3rd of 3

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
LafayetteKayaDongying

While Kaya and Dongying both built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, Lafayette built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Kaya and Dongying both became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Lafayette became progressively more disconnected. Notably, Lafayette had a more sprawly network than Kaya in 1975 but the two have since reversed their relative ranking.