Bongor in context: Street-network sprawl trends

Bongor in context

0.81.62.43.2<19751976–19901991–20052006–2020SNDi of street additions
0.81.62.43.2<19751976–19901991–20052006–2020SNDi of entire street network
BongorMayo-Kebbi Est (Region)Chad (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bongor plotted against Mayo-Kebbi Est and Chad. The SNDi of new construction in Bongor 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. Most recently, Bongor's incremental SNDi rose from 1.25 to 2.22 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bongor ranked 2nd out of 2 cities in Mayo-Kebbi Est and 9th out of 31 in Chad as of 2020.

New Street Additions (2006–2020)

SNDi value
2.22
Rank in Chad
16th of 31
Rank in Mayo-Kebbi Est
2nd of 2

Entire Network (Aggregate)

SNDi value
1.43
Rank in Chad
9th of 31
Rank in Mayo-Kebbi Est
2nd of 2

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
BongorAllentownKailashahar

In new street additions, Bongor and Allentown both fluctuated in its street-construction patterns, while Kailashahar fluctuated in its street-construction patterns. For the full network, Bongor and Allentown both became progressively more disconnected, while Kailashahar became progressively more connected. Bongor and Allentown have been converging in their street-network character since 1975.