Tainan in context: Street-network sprawl trends

Tainan in context

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
TainanTaiwan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tainan plotted against Taiwan. Both Tainan and Taiwan follow the same trend. Most recently, Tainan's incremental SNDi rose from 1.56 to 2.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tainan ranked 1st out of 21 in Taiwan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.04
Rank in Taiwan
4th of 21

Entire Network (Aggregate)

SNDi value
1.36
Rank in Taiwan
1st of 21

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
TainanTianjia'anSuhaj

In new street additions, Tainan and Suhaj both fluctuated in its street-construction patterns, while Tianjia‘an built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Tainan and Suhaj both became progressively more disconnected, while Tianjia‘an became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.