Tangail in context: Street-network sprawl trends

Tangail in context

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
TangailDhaka (Region)Bangladesh (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tangail plotted against Dhaka and Bangladesh. The SNDi of new construction in Tangail rose steadily, compared to Dhaka which followed a zig-zag trend with an overall increase and Bangladesh which followed a zig-zag trend with an overall increase. Most recently, Tangail's incremental SNDi rose from 5.09 to 7.23 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tangail ranked 6th out of 40 cities in Dhaka and 46th out of 234 in Bangladesh as of 2020.

New Street Additions (2006–2020)

SNDi value
7.23
Rank in Bangladesh
98th of 234
Rank in Dhaka
15th of 40

Entire Network (Aggregate)

SNDi value
4.16
Rank in Bangladesh
46th of 234
Rank in Dhaka
6th of 40

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
TangailCoventryKanchipuram

In new street additions, Tangail built increasingly disconnected streets over time, while Coventry built increasingly disconnected streets from 1975 through 1991-2005, then improved and Kanchipuram fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Notably, Tangail had a more connected network than Coventry in 1975 but the two have since reversed their relative ranking.