Tire in context: Street-network sprawl trends

Tire in context

11.522.5<19751976–19901991–20052006–2020SNDi of street additions
11.522.5<19751976–19901991–20052006–2020SNDi of entire street network
TireIzmir (Region)Turkey (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tire plotted against Izmir and Turkey. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tire's incremental SNDi rose from 1.18 to 1.22 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tire ranked 1st out of 6 cities in Izmir and 3rd out of 174 in Turkey as of 2020.

New Street Additions (2006–2020)

SNDi value
1.22
Rank in Turkey
1st of 174
Rank in Izmir
1st of 6

Entire Network (Aggregate)

SNDi value
1.14
Rank in Turkey
3rd of 174
Rank in Izmir
1st of 6

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
TireSho'rchiXiangfen

In new street additions, Tire and Xiangfen both fluctuated in its street-construction patterns, while Sho'rchi built increasingly disconnected streets over time. For the full network, Tire and Sho'rchi both became progressively more disconnected, while Xiangfen grew more disconnected from 1975 through 1976-1990, then improved.