Birganj in context: Street-network sprawl trends

Birganj in context

468<19751976–19901991–20052006–2020SNDi of street additions
468<19751976–19901991–20052006–2020SNDi of entire street network
BirganjRangpur (Region)Bangladesh (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Birganj plotted against Rangpur and Bangladesh. The SNDi of new construction in Birganj peaked in 1991-2005, compared to Rangpur which rose steadily and Bangladesh which followed a zig-zag trend with an overall increase. Most recently, Birganj's incremental SNDi fell from 5.0 to 4.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Birganj ranked 9th out of 30 cities in Rangpur and 55th out of 234 in Bangladesh as of 2020.

New Street Additions (2006–2020)

SNDi value
4.87
Rank in Bangladesh
35th of 234
Rank in Rangpur
6th of 30

Entire Network (Aggregate)

SNDi value
4.46
Rank in Bangladesh
55th of 234
Rank in Rangpur
9th of 30

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

What about similarly populated cities?

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
BirganjSanheEdappadi

In new street additions, Birganj built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Sanhe fluctuated in its street-construction patterns and Edappadi built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Birganj and Sanhe have been converging in their street-network character since 1975.