Dahra Djoloff in context: Street-network sprawl trends

Dahra Djoloff in context

1.21.51.82.1<19751976–19901991–20052006–2020SNDi of street additions
1.21.51.82.1<19751976–19901991–20052006–2020SNDi of entire street network
Dahra DjoloffLouga (Region)Senegal (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dahra Djoloff plotted against Louga and Senegal. The SNDi of new construction in Dahra Djoloff was at its lowest in 1976-1990, compared to Louga which was at its lowest in 1976-1990 and Senegal which followed a zig-zag trend with an overall increase. Most recently, Dahra Djoloff's incremental SNDi rose from 1.21 to 1.8 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dahra Djoloff ranked 3rd out of 3 cities in Louga and 16th out of 25 in Senegal as of 2020.

New Street Additions (2006–2020)

SNDi value
1.8
Rank in Senegal
14th of 25
Rank in Louga
2nd of 3

Entire Network (Aggregate)

SNDi value
1.45
Rank in Senegal
16th of 25
Rank in Louga
3rd of 3

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
Dahra DjoloffGuyukOkaya

In new street additions, Dahra Djoloff built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Guyuk fluctuated in its street-construction patterns and Okaya built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Guyuk and Okaya both became progressively more disconnected, while Dahra Djoloff became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Dahra Djoloff and Guyuk have been growing further apart in their street-network character since 1975.