Ponnani in context: Street-network sprawl trends

Ponnani in context

4567<19751976–19901991–20052006–2020SNDi of street additions
4567<19751976–19901991–20052006–2020SNDi of entire street network
PonnaniKerala (Region)India (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ponnani plotted against Kerala and India. The SNDi of new construction in Ponnani was at its lowest in 1976-1990, compared to Kerala which was at its lowest in 1976-1990 and India which followed a zig-zag trend with an overall increase. Most recently, Ponnani's incremental SNDi rose from 5.67 to 6.34 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ponnani ranked 43rd out of 48 cities in Kerala and 1713th out of 1868 in India as of 2020.

New Street Additions (2006–2020)

SNDi value
6.34
Rank in India
1447th of 1868
Rank in Kerala
33rd of 48

Entire Network (Aggregate)

SNDi value
6.16
Rank in India
1713th of 1868
Rank in Kerala
43rd of 48

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

What about similarly populated cities?

4.55.46.37.2<19751976–19901991–20052006–2020SNDi of street additions
4.55.46.37.2<19751976–19901991–20052006–2020SNDi of entire street network
PonnaniBakuMalang

In new street additions, Ponnani built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Baku built increasingly disconnected streets from 1975 through 1991-2005, then improved and Malang fluctuated in its street-construction patterns. Looking at the full network, Baku and Malang both became progressively more disconnected, while Ponnani became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Ponnani and Baku have been converging in their street-network character since 1975.