Kigali in context: Street-network sprawl trends

Kigali in context

3.23.644.4<19751976–19901991–20052006–2020SNDi of street additions
3.23.644.4<19751976–19901991–20052006–2020SNDi of entire street network
KigaliUmujyi wa Kigali (Region)Rwanda (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Kigali plotted against Umujyi wa Kigali and Rwanda. The SNDi of new construction in Kigali rose steadily, compared to Umujyi wa Kigali which rose steadily and Rwanda which was at its lowest in 1976-1990. Most recently, Kigali's incremental SNDi rose from 3.77 to 4.29 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kigali ranked 1st out of 1 cities in Umujyi wa Kigali and 4th out of 5 in Rwanda as of 2020.

New Street Additions (2006–2020)

SNDi value
4.29
Rank in Rwanda
3rd of 5
Rank in Umujyi wa Kigali
1st of 1

Entire Network (Aggregate)

SNDi value
3.67
Rank in Rwanda
4th of 5
Rank in Umujyi wa Kigali
1st of 1

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

What about similarly populated cities?

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
KigaliAmsterdamVitoria

In new street additions, Kigali and Amsterdam both built increasingly disconnected streets over time, while Vitória fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Kigali and Amsterdam have been growing further apart in their street-network character since 1975.