Tanene 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 Tanene plotted against Kindia and Guinea. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tanene's incremental SNDi rose from 2.56 to 4.74 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tanene ranked 1st out of 2 cities in Kindia and 19th out of 24 in Guinea as of 2020.

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

What about similarly populated cities?

• Xinji, China
• Qingjiang, China
• Orlamish, Afghanistan
• Niono-Socoura, Mali
• Gugang, China
• Bariadi, Tanzania

In new street additions, Tanene and Xinji both built increasingly disconnected streets over time, while Niono-Socoura built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Notably, Tanene had a more connected network than Xinji in 1975 but the two have since reversed their relative ranking.