Bolo 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 Bolo plotted against Rivers and Nigeria. The SNDi of new construction in Bolo followed a zig-zag trend with an overall increase, compared to Rivers which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Bolo's incremental SNDi fell from 15.83 to 10.08 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bolo ranked 25th out of 28 cities in Rivers and 415th 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?

• Chingo, Angola
• Sido Dadi, Indonesia
• Manzini, Swaziland
• Sake, Democratic Republic of the Congo
• Al Manshiyah al Qibliyah, Egypt
• Jena, Germany

In new street additions, Bolo fluctuated in its street-construction patterns, while Chingo built increasingly disconnected streets from 1975 through 1976-1990, then improved and Sake built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Bolo became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Chingo grew more disconnected from 1975 through 1991-2005, then improved and Sake became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Bolo and Chingo have been growing further apart in their street-network character since 1975.