Vallejo in context: Street-network sprawl trends

Vallejo in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
VallejoCalifornia (Region)United States (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Vallejo plotted against California and United States. The SNDi of new construction in Vallejo peaked in 1976-1990, compared to California which peaked in 1976-1990 and United States which peaked in 1991-2005. Most recently, Vallejo's incremental SNDi fell from 4.62 to 4.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Vallejo ranked 34th out of 60 cities in California and 228th out of 333 in United States as of 2020.

New Street Additions (2006–2020)

SNDi value
4.04
Rank in United States
148th of 333
Rank in California
24th of 60

Entire Network (Aggregate)

SNDi value
3.71
Rank in United States
228th of 333
Rank in California
34th of 60

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

What about similarly populated cities?

4681012<19751976–19901991–20052006–2020SNDi of street additions
4681012<19751976–19901991–20052006–2020SNDi of entire street network
VallejoBattagramGangtok

While Battagram and Gangtok both fluctuated in its street-construction patterns, Vallejo built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. For the full network, Vallejo became progressively more disconnected, while Battagram fluctuated in connectivity and Gangtok became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards.