Enugu Umunze 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 Enugu Umunze plotted against Anambra and Nigeria. The SNDi of new construction in Enugu Umunze rose steadily, compared to Anambra which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Enugu Umunze's incremental SNDi rose from 4.68 to 5.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Enugu Umunze ranked 1st out of 4 cities in Anambra and 239th 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?

• Hikone, Japan
• Nicosia, Northern Cyprus
• Jaldhaka, Bangladesh
• Shuitou, China
• Turku, Finland
• Luoping, China

In new street additions, Enugu Umunze built increasingly disconnected streets over time, while Hikone fluctuated in its street-construction patterns and Shuitou built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Enugu Umunze and Hikone both became progressively more disconnected, while Shuitou became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Enugu Umunze and Shuitou have been converging in their street-network character since 1975.