Tulu Bolo in context: Street-network sprawl trends
Tulu Bolo in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tulu Bolo plotted against Oromia and Ethiopia. The SNDi of new construction in Tulu Bolo rose steadily, 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, Tulu Bolo's incremental SNDi rose from 2.72 to 4.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tulu Bolo ranked 60th out of 71 cities in Oromia and 152nd out of 181 in Ethiopia as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 4.64
- Rank in Ethiopia
- 140th of 181
- Rank in Oromia
- 56th of 71
Entire Network (Aggregate)
- SNDi value
- 3.5
- Rank in Ethiopia
- 152nd of 181
- Rank in Oromia
- 60th of 71
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Tulu Bolo built increasingly disconnected streets over time, while Dandari built increasingly disconnected streets from 1975 through 1991-2005, then improved and Tandalti fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Tulu Bolo and Tandalti have been growing further apart in their street-network character since 1975.