Penco 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 Penco plotted against Bío-Bío and Chile. The SNDi of new construction in Penco peaked in 1976-1990, compared to Bío-Bío which followed a zig-zag trend with an overall increase and Chile which followed a zig-zag trend with an overall increase. Most recently, Penco's incremental SNDi fell from 3.14 to 2.84 between 1991-2005 and 2006-2020. In terms of the aggregate network, Penco ranked 1st out of 6 cities in Bío-Bío and 17th 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?

• Ravensburg, Germany
• Egwuachi, Nigeria
• Barbil, India
• Leander, United States
• Jambusar, India
• Poptún, Guatemala

In new street additions, Penco built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Ravensburg built increasingly disconnected streets from 1975 through 1991-2005, then improved and Leander fluctuated in its street-construction patterns. For the full network, Penco grew more disconnected from 1975 through 1991-2005, then improved, while Ravensburg became progressively more disconnected and Leander fluctuated in connectivity. Penco and Ravensburg have been growing further apart in their street-network character since 1975.