Tatvan in context: Street-network sprawl trends

Tatvan in context

1.82.73.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.6<19751976–19901991–20052006–2020SNDi of entire street network
TatvanBitlis (Region)Turkey (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tatvan plotted against Bitlis and Turkey. The SNDi of new construction in Tatvan was at its lowest in 1976-1990, compared to Bitlis which fell steadily and Turkey which followed a zig-zag trend with an overall increase. Most recently, Tatvan's incremental SNDi rose from 2.17 to 2.19 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tatvan ranked 1st out of 1 cities in Bitlis and 94th out of 174 in Turkey as of 2020.

New Street Additions (2006–2020)

SNDi value
2.19
Rank in Turkey
76th of 174
Rank in Bitlis
1st of 1

Entire Network (Aggregate)

SNDi value
2.07
Rank in Turkey
94th of 174
Rank in Bitlis
1st of 1

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

What about similarly populated cities?

11.522.53<19751976–19901991–20052006–2020SNDi of street additions
11.522.53<19751976–19901991–20052006–2020SNDi of entire street network
TatvanBougouniBani Saad

In new street additions, Tatvan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Bougouni built increasingly disconnected streets over time and Bani Saad fluctuated in its street-construction patterns. For the full network, Tatvan became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Bougouni became progressively more disconnected and Bani Saad fluctuated in connectivity. Tatvan and Bani Saad have been converging in their street-network character since 1975.