Koidu Town in context: Street-network sprawl trends

Koidu Town in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
Koidu TownEastern (Region)Sierra Leone (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Koidu Town plotted against Eastern and Sierra Leone. While Eastern and Sierra Leone both rose steadily, Koidu Town's new street additions rose steadily. Most recently, Koidu Town's incremental SNDi rose from 3.58 to 3.91 between 1991-2005 and 2006-2020. In terms of the aggregate network, Koidu Town ranked 1st out of 3 cities in Eastern and 3rd out of 12 in Sierra Leone as of 2020.

New Street Additions (2006–2020)

SNDi value
3.91
Rank in Sierra Leone
2nd of 12
Rank in Eastern
1st of 3

Entire Network (Aggregate)

SNDi value
3.24
Rank in Sierra Leone
3rd of 12
Rank in Eastern
1st of 3

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
Koidu TownBaiyunBalaghat

In new street additions, Koidu Town and Balaghat both built increasingly disconnected streets over time, while Baiyun fluctuated in its street-construction patterns. For the full network, Koidu Town and Balaghat both became progressively more disconnected, while Baiyun fluctuated in connectivity. Notably, Koidu Town had a more sprawly network than Balaghat in 1975 but the two have since reversed their relative ranking.