koya in context: Street-network sprawl trends

koya in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
koyaArbil (Region)Iraq (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with koya plotted against Arbil and Iraq. The SNDi of new construction in koya was at its lowest in 1976-1990, compared to Arbil which followed a zig-zag trend with an overall increase and Iraq which peaked in 1976-1990. Most recently, koya's incremental SNDi rose from 2.2 to 2.27 between 1991-2005 and 2006-2020. In terms of the aggregate network, koya ranked 1st out of 3 cities in Arbil and 23rd out of 86 in Iraq as of 2020.

New Street Additions (2006–2020)

SNDi value
2.27
Rank in Iraq
23rd of 86
Rank in Arbil
1st of 3

Entire Network (Aggregate)

SNDi value
2.21
Rank in Iraq
23rd of 86
Rank in Arbil
1st of 3

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
koyaTaroudantBaracoa

In new street additions, koya built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Taroudant fluctuated in its street-construction patterns and Baracoa built increasingly disconnected streets over time. For the full network, koya became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Taroudant fluctuated in connectivity and Baracoa became progressively more disconnected. Notably, koya had a more sprawly network than Baracoa in 1975 but the two have since reversed their relative ranking.