Amakpo 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 Amakpo plotted against Abia and Nigeria. While Abia and Nigeria both followed a zig-zag trend with an overall increase, Amakpo's new street additions followed a zig-zag trend with an overall increase. Most recently, Amakpo's incremental SNDi rose from 3.73 to 4.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Amakpo ranked 2nd out of 9 cities in Abia and 240th 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?

• Kuje, Nigeria
• Caiguan, China
• Banma Itahri, India
• Wabag, Papua New Guinea
• Xiangshan, China
• Mount Annan, Australia

In new street additions, Amakpo fluctuated in its street-construction patterns, while Kuje built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Wabag fluctuated in its street-construction patterns. Looking at the full network, Kuje and Wabag both became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Amakpo became progressively more disconnected. Amakpo and Kuje have been growing further apart in their street-network character since 1975.