Ngai Giao 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 Ngai Giao plotted against Bà Rịa - Vũng Tàu and Vietnam. The SNDi of new construction in Ngai Giao was at its lowest in 1976-1990, compared to Bà Rịa - Vũng Tàu which followed a zig-zag trend with an overall increase and Vietnam which rose steadily. Most recently, Ngai Giao's incremental SNDi rose from 2.67 to 3.4 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ngai Giao ranked 1st out of 4 cities in Bà Rịa - Vũng Tàu and 9th 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?

• Estância, Brazil
• Lobatse, Botswana
• Jenin, Palestine
• Barwa Rajapakar, India
• Chư Sê, Vietnam
• Rundu, Namibia

In new street additions, Ngai Giao built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Estância fluctuated in its street-construction patterns and Barwa Rajapakar built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Ngai Giao became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Estância became progressively more disconnected and Barwa Rajapakar became progressively more connected. Notably, Ngai Giao had a more sprawly network than Barwa Rajapakar in 1975 but the two have since reversed their relative ranking.