Port Blair in context: Street-network sprawl trends

Port Blair in context

468<19751976–19901991–20052006–2020SNDi of street additions
468<19751976–19901991–20052006–2020SNDi of entire street network
Port BlairAndaman and Nicobar (Region)India (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Port Blair plotted against Andaman and Nicobar and India. The SNDi of new construction in Port Blair peaked in 1991-2005, compared to Andaman and Nicobar which peaked in 1991-2005 and India which followed a zig-zag trend with an overall increase. Most recently, Port Blair's incremental SNDi fell from 8.59 to 8.03 between 1991-2005 and 2006-2020. In terms of the aggregate network, Port Blair ranked 1st out of 1 cities in Andaman and Nicobar and 1743rd out of 1868 in India as of 2020.

New Street Additions (2006–2020)

SNDi value
8.03
Rank in India
1665th of 1868
Rank in Andaman and Nicobar
1st of 1

Entire Network (Aggregate)

SNDi value
6.51
Rank in India
1743rd of 1868
Rank in Andaman and Nicobar
1st of 1

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

What about similarly populated cities?

036912<19751976–19901991–20052006–2020SNDi of street additions
036912<19751976–19901991–20052006–2020SNDi of entire street network
Port BlairAmbajogaiKahemba

While Ambajogai and Kahemba both built increasingly disconnected streets over time, Port Blair built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend.