Tiruchirappalli in context: Street-network sprawl trends

Tiruchirappalli in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
TiruchirappalliTamil Nadu (Region)India (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tiruchirappalli plotted against Tamil Nadu and India. The SNDi of new construction in Tiruchirappalli rose steadily, compared to Tamil Nadu which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Tiruchirappalli's incremental SNDi rose from 3.82 to 4.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tiruchirappalli ranked 68th out of 121 cities in Tamil Nadu and 991st out of 1868 in India as of 2020.

New Street Additions (2006–2020)

SNDi value
4.81
Rank in India
948th of 1868
Rank in Tamil Nadu
54th of 121

Entire Network (Aggregate)

SNDi value
3.87
Rank in India
991st of 1868
Rank in Tamil Nadu
68th of 121

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
TiruchirappalliDavao CityMysuru

In new street additions, Tiruchirappalli and Mysuru both built increasingly disconnected streets over time, while Davao City built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend.