Jimma in context: Street-network sprawl trends

Jimma in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
JimmaOromia (Region)Ethiopia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Jimma plotted against Oromia and Ethiopia. The SNDi of new construction in Jimma was at its lowest in 1976-1990, compared to Oromia which followed a zig-zag trend with an overall increase and Ethiopia which followed a zig-zag trend with an overall increase. Most recently, Jimma's incremental SNDi rose from 2.07 to 2.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Jimma ranked 38th out of 71 cities in Oromia and 91st out of 181 in Ethiopia as of 2020.

New Street Additions (2006–2020)

SNDi value
2.85
Rank in Ethiopia
54th of 181
Rank in Oromia
21st of 71

Entire Network (Aggregate)

SNDi value
2.52
Rank in Ethiopia
91st of 181
Rank in Oromia
38th of 71

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
JimmaBeldangaBahawalnagar

While Beldanga and Bahawalnagar both built increasingly disconnected streets over time, Jimma built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. Looking at the full network, Beldanga and Bahawalnagar both became progressively more disconnected, while Jimma became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Jimma and Bahawalnagar have been growing further apart in their street-network character since 1975.