Doba 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 Doba plotted against Logone Oriental and Chad. The SNDi of new construction in Doba peaked in 1991-2005, compared to Logone Oriental which peaked in 1976-1990 and Chad which rose steadily. Most recently, Doba's incremental SNDi fell from 4.5 to 0.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Doba ranked 3rd out of 3 cities in Logone Oriental and 18th out of 31 in Chad as of 2020.

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

What about similarly populated cities?

• Odense, Denmark
• Hengyang, China
• Tongzi, China
• Tarragona, Spain
• Karangwareng, Indonesia
• Huayuan, China

While Odense and Tarragona both built increasingly disconnected streets over time, Doba built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Odense and Tarragona both became progressively more disconnected, while Doba grew more disconnected from 1975 through 1991-2005, then improved. Notably, Doba had a more sprawly network than Tarragona in 1975 but the two have since reversed their relative ranking.