Bangkok in context: Street-network sprawl trends

Bangkok in context

5678910<19751976–19901991–20052006–2020SNDi of street additions
5678910<19751976–19901991–20052006–2020SNDi of entire street network
BangkokBangkok Metropolis (Region)Thailand (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bangkok plotted against Bangkok Metropolis and Thailand. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Bangkok's incremental SNDi rose from 8.34 to 9.35 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bangkok ranked 1st out of 1 cities in Bangkok Metropolis and 54th out of 54 in Thailand as of 2020.

New Street Additions (2006–2020)

SNDi value
9.35
Rank in Thailand
54th of 54
Rank in Bangkok Metropolis
1st of 1

Entire Network (Aggregate)

SNDi value
7.87
Rank in Thailand
54th of 54
Rank in Bangkok Metropolis
1st of 1

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
BangkokKarachiNew York City

While Karachi and New York City both fluctuated in its street-construction patterns, Bangkok built increasingly disconnected streets over time in new street additions. For the full street network, though, all three cities follow the same trend. Bangkok and Karachi have been growing further apart in their street-network character since 1975.