Adré in context: Street-network sprawl trends

Adre in context

0.71.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
0.71.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
AdreOuaddai (Region)Chad (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Adré plotted against Ouaddaï and Chad. The SNDi of new construction in Adré followed a zig-zag trend with an overall decrease, compared to Ouaddaï which rose steadily and Chad which rose steadily. Most recently, Adré's incremental SNDi fell from 1.19 to 1.0 between 1991-2005 and 2006-2020. In terms of the aggregate network, Adré ranked 1st out of 2 cities in Ouaddaï and 3rd out of 31 in Chad as of 2020.

New Street Additions (2006–2020)

SNDi value
1.0
Rank in Chad
2nd of 31
Rank in Ouaddaï
1st of 2

Entire Network (Aggregate)

SNDi value
1.05
Rank in Chad
3rd of 31
Rank in Ouaddaï
1st of 2

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

What about similarly populated cities?

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
AdreIgualaSivaganga

In new street additions, Adré fluctuated in its street-construction patterns, while Iguala fluctuated in its street-construction patterns and Sivaganga built increasingly disconnected streets over time. Looking at the full network, Iguala and Sivaganga both became progressively more disconnected, while Adré fluctuated in connectivity. Notably, Adré had a more sprawly network than Sivaganga in 1975 but the two have since reversed their relative ranking.