Bokoro in context: Street-network sprawl trends

Bokoro in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
BokoroHadjer-Lamis (Region)Chad (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bokoro plotted against Hadjer-Lamis and Chad. The SNDi of new construction in Bokoro peaked in 1991-2005, compared to Hadjer-Lamis which peaked in 1976-1990 and Chad which rose steadily. Most recently, Bokoro's incremental SNDi fell from 5.06 to 3.31 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bokoro ranked 1st out of 1 cities in Hadjer-Lamis and 20th out of 31 in Chad as of 2020.

New Street Additions (2006–2020)

SNDi value
3.31
Rank in Chad
21st of 31
Rank in Hadjer-Lamis
1st of 1

Entire Network (Aggregate)

SNDi value
3.13
Rank in Chad
20th of 31
Rank in Hadjer-Lamis
1st of 1

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
BokoroBundaDera Murad Jamali

In new street additions, Bokoro and Bunda both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Dera Murad Jamali fluctuated in its street-construction patterns. For the full network, Bokoro and Dera Murad Jamali both fluctuated in connectivity, while Bunda became progressively more disconnected. Notably, Bokoro had a more connected network than Bunda in 1975 but the two have since reversed their relative ranking.