Tarkwa in context: Street-network sprawl trends

Tarkwa in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
TarkwaWestern (Region)Ghana (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tarkwa plotted against Western and Ghana. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tarkwa's incremental SNDi rose from 5.08 to 6.27 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tarkwa ranked 2nd out of 2 cities in Western and 51st out of 53 in Ghana as of 2020.

New Street Additions (2006–2020)

SNDi value
6.27
Rank in Ghana
47th of 53
Rank in Western
2nd of 2

Entire Network (Aggregate)

SNDi value
5.22
Rank in Ghana
51st of 53
Rank in Western
2nd of 2

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
TarkwaTukh al Qaramuss wa Kafr Sarkis MansurYeji District

In new street additions, Tarkwa and Tukh al Qaramuss wa Kafr Sarkis Mansur both fluctuated in its street-construction patterns, while Yeji District built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Tarkwa and Tukh al Qaramuss wa Kafr Sarkis Mansur have been growing further apart in their street-network character since 1975.