Mongo in context: Street-network sprawl trends

Mongo in context

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
MongoGuera (Region)Chad (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Mongo plotted against Guéra and Chad. The SNDi of new construction in Mongo followed a zig-zag trend with an overall increase, compared to Guéra which peaked in 1976-1990 and Chad which rose steadily. Most recently, Mongo's incremental SNDi rose from 1.18 to 1.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Mongo ranked 1st out of 2 cities in Guéra and 10th out of 31 in Chad as of 2020.

New Street Additions (2006–2020)

SNDi value
1.78
Rank in Chad
11th of 31
Rank in Guéra
1st of 2

Entire Network (Aggregate)

SNDi value
1.46
Rank in Chad
10th of 31
Rank in Guéra
1st of 2

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
MongoValley HiPagadian

In new street additions, Mongo fluctuated in its street-construction patterns, while Valley Hi built increasingly disconnected streets from 1975 through 1991-2005, then improved and Pagadian built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Mongo and Pagadian have been growing further apart in their street-network character since 1975.