Tam Kỳ in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tam Kỳ plotted against Quảng Nam and Vietnam. The SNDi of new construction in Tam Kỳ was at its lowest in 1991-2005, compared to Quảng Nam which was at its lowest in 1991-2005 and Vietnam which rose steadily. Most recently, Tam Kỳ's incremental SNDi rose from 2.96 to 3.02 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tam Kỳ ranked 1st out of 2 cities in Quảng Nam and 14th out of 126 in Vietnam as of 2020.

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

What about similarly populated cities?

• Barbigha, India
• Khairpur Nathan Shah, Pakistan
• Sundarganj, Bangladesh
• Tongyang, China
• Chishui, China
• Kırıkhan, Turkey

In new street additions, Tam Kỳ and Tongyang both built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Barbigha fluctuated in its street-construction patterns. For the full network, Tam Kỳ and Tongyang both became progressively more connected, while Barbigha became progressively more connected. Tam Kỳ and Barbigha have been converging in their street-network character since 1975.