Puerto Montt 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 Puerto Montt plotted against Los Lagos and Chile. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Puerto Montt's incremental SNDi rose from 3.04 to 3.32 between 1991-2005 and 2006-2020. In terms of the aggregate network, Puerto Montt ranked 1st out of 2 cities in Los Lagos and 19th 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?

• Galkayo, Somalia
• Santa Cruz, Philippines
• Songkhla, Thailand
• Zhangjiajie, China
• Kütahya, Turkey
• دنجواي, Egypt

In new street additions, Puerto Montt fluctuated in its street-construction patterns, while Galkayo built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Zhangjiajie built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Puerto Montt became progressively more disconnected, while Galkayo became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Zhangjiajie grew more disconnected from 1975 through 1991-2005, then improved. Notably, Puerto Montt had a more sprawly network than Zhangjiajie in 1975 but the two have since reversed their relative ranking.