Fianga 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 Fianga plotted against Mayo-Kebbi Est and Chad. The SNDi of new construction in Fianga followed a zig-zag trend with an overall increase, compared to Mayo-Kebbi Est which followed a zig-zag trend with an overall increase and Chad which rose steadily. In terms of the aggregate network, Fianga ranked 1st out of 2 cities in Mayo-Kebbi Est and 1st out of 31 in Chad as of 2020.

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

What about similarly populated cities?

• Mamfe, Cameroon
• Ataye, Ethiopia
• Xingren, China
• Yuanqu, China
• Lingxi, China
• Dormaa Ahenkro, Ghana

In new street additions, Fianga fluctuated in its street-construction patterns, while Mamfe built increasingly disconnected streets over time and Yuanqu built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Fianga grew more disconnected from 1975 through 1976-1990, then improved, while Mamfe became progressively more disconnected and Yuanqu grew more disconnected from 1975 through 1991-2005, then improved. Fianga and Mamfe have been growing further apart in their street-network character since 1975.