Taichung in context: Street-network sprawl trends

Taichung in context

1.622.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
1.622.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
TaichungTaiwan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Taichung plotted against Taiwan. Both Taichung and Taiwan follow the same trend. Most recently, Taichung's incremental SNDi rose from 2.22 to 2.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Taichung ranked 13th out of 21 in Taiwan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.63
Rank in Taiwan
12th of 21

Entire Network (Aggregate)

SNDi value
2.06
Rank in Taiwan
13th of 21

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

What about similarly populated cities?

1.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.82.43<19751976–19901991–20052006–2020SNDi of entire street network
TaichungFukuokaPhiladelphia

In new street additions, Taichung and Philadelphia both fluctuated in its street-construction patterns, while Fukuoka built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full street network, though, all three cities follow the same trend. Notably, Taichung had a more connected network than Fukuoka in 1975 but the two have since reversed their relative ranking.