Longmont 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 Longmont plotted against Colorado and United States. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Longmont's incremental SNDi fell from 2.98 to 2.26 between 1991-2005 and 2006-2020. In terms of the aggregate network, Longmont ranked 3rd out of 9 cities in Colorado and 78th out of 333 in United States as of 2020.

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

What about similarly populated cities?

• Tissemsilt, Algeria
• Phú Mỹ, Vietnam
• Daozhen, China
• Piduguralla, India
• 黄姑社区, China
• Haikou, China

In new street additions, Longmont built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Tissemsilt built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Piduguralla built increasingly disconnected streets over time. For the full network, Longmont grew more disconnected from 1975 through 1991-2005, then improved, while Tissemsilt became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Piduguralla became progressively more disconnected. Longmont and Piduguralla have been growing further apart in their street-network character since 1975.