Sangasumi 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 Sangasumi plotted against Adamawa and Nigeria. The SNDi of new construction in Sangasumi rose steadily, compared to Adamawa which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Sangasumi's incremental SNDi rose from 3.14 to 6.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sangasumi ranked 6th out of 11 cities in Adamawa and 168th out of 422 in Nigeria as of 2020.

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

What about similarly populated cities?

• Robe, Ethiopia
• Beipiao, China
• Venjaramoodu, India
• Dancheng, China
• Barreiras, Brazil
• Yadgir, India

In new street additions, Sangasumi and Robe both built increasingly disconnected streets over time, while Dancheng fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Sangasumi and Robe have been converging in their street-network character since 1975.