Concón in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Concón plotted against Valparaíso and Chile. The SNDi of new construction in Concón was at its lowest in 1976-1990, compared to Valparaíso which followed a zig-zag trend with an overall increase and Chile which followed a zig-zag trend with an overall increase. Most recently, Concón's incremental SNDi rose from 2.1 to 3.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Concón ranked 1st out of 7 cities in Valparaíso and 5th out of 38 in Chile as of 2020.

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

What about similarly populated cities?

• Hammam Damt, Yemen
• Serra Talhada, Brazil
• Suar, India
• Berai, India
• Takalghat, India
• Giddalur, India

While Hammam Damt and Berai both fluctuated in its street-construction patterns, Concón built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. For the full network, Concón became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Hammam Damt became progressively more disconnected and Berai fluctuated in connectivity. Concón and Hammam Damt have been growing further apart in their street-network character since 1975.