Sammanturai in context: Street-network sprawl trends

Sammanturai in context

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
SammanturaiAmpara (Region)Sri Lanka (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sammanturai plotted against Ampara and Sri Lanka. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Sammanturai's incremental SNDi rose from 3.11 to 3.19 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sammanturai ranked 2nd out of 3 cities in Ampara and 2nd out of 21 in Sri Lanka as of 2020.

New Street Additions (2006–2020)

SNDi value
3.19
Rank in Sri Lanka
2nd of 21
Rank in Ampara
2nd of 3

Entire Network (Aggregate)

SNDi value
1.9
Rank in Sri Lanka
2nd of 21
Rank in Ampara
2nd of 3

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
SammanturaiKauran YankwaniKecamatan Kopang

In new street additions, Sammanturai built increasingly disconnected streets over time, while Kauran Yankwani fluctuated in its street-construction patterns and Kecamatan Kopang built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Sammanturai and Kauran Yankwani have been converging in their street-network character since 1975.