Fomboni 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 Fomboni plotted against Mwali and Comoros. The SNDi of new construction in Fomboni peaked in 1976-1990, compared to Mwali which peaked in 1991-2005 and Comoros which peaked in 1991-2005. Most recently, Fomboni's incremental SNDi fell from 2.9 to 1.67 between 1991-2005 and 2006-2020. In terms of the aggregate network, Fomboni ranked 1st out of 1 cities in Mwali and 1st out of 2 in Comoros as of 2020.

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

What about similarly populated cities?

• Jiuquan, China
• Kabwe, Zambia
• Qionglai, China
• Bhuj, India
• Jaffna, Sri Lanka
• Oviedo / Uviéu, Spain

In new street additions, Fomboni built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Jiuquan built increasingly disconnected streets from 1975 through 1991-2005, then improved and Bhuj fluctuated in street-construction patterns. Looking at the full network, Jiuquan and Bhuj both became progressively more disconnected, while Fomboni grew more disconnected from 1975 through 1991-2005, then improved. Fomboni and Bhuj have been growing further apart in their street-network character since 1975.