Dema 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 Dema plotted against Rivers and Nigeria. While Rivers and Nigeria both followed a zig-zag trend with an overall increase, Dema's new street additions followed a zig-zag trend with an overall increase. Most recently, Dema's incremental SNDi rose from 8.09 to 12.08 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dema ranked 23rd out of 28 cities in Rivers and 404th 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?

• Chinhoyi, Zimbabwe
• Prešov, Slovakia
• Bansdih, India
• Fengxiang, China
• Kenosha, United States
• Nkawkaw, Ghana

In new street additions, Dema fluctuated in its street-construction patterns, while Chinhoyi built increasingly disconnected streets over time and Fengxiang built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Dema and Chinhoyi both became progressively more disconnected, while Fengxiang grew more disconnected from 1975 through 1991-2005, then improved. Dema and Chinhoyi have been growing further apart in their street-network character since 1975.