Irgalem in context: Street-network sprawl trends

Irgalem in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
IrgalemSouthern Nations, Nationalities (Region)Ethiopia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Irgalem plotted against Southern Nations, Nationalities and Ethiopia. The SNDi of new construction in Irgalem rose steadily, compared to Southern Nations, Nationalities which followed a zig-zag trend with an overall increase and Ethiopia which followed a zig-zag trend with an overall increase. Most recently, Irgalem's incremental SNDi rose from 3.32 to 4.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Irgalem ranked 29th out of 39 cities in Southern Nations, Nationalities and 118th out of 181 in Ethiopia as of 2020.

New Street Additions (2006–2020)

SNDi value
4.85
Rank in Ethiopia
144th of 181
Rank in Southern Nations, Nationalities
33rd of 39

Entire Network (Aggregate)

SNDi value
2.91
Rank in Ethiopia
118th of 181
Rank in Southern Nations, Nationalities
29th of 39

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
IrgalemShahrisabzAnantnag

In new street additions, Irgalem and Anantnag both built increasingly disconnected streets over time, while Shahrisabz built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Irgalem and Shahrisabz have been converging in their street-network character since 1975.