Saint-Jean-sur-Richelieu 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 Saint-Jean-sur-Richelieu plotted against Québec and Canada. The SNDi of new construction in Saint-Jean-sur-Richelieu rose steadily, compared to Québec which followed a zig-zag trend with an overall increase and Canada which peaked in 1976-1990. Most recently, Saint-Jean-sur-Richelieu's incremental SNDi rose from 4.12 to 5.74 between 1991-2005 and 2006-2020. In terms of the aggregate network, Saint-Jean-sur-Richelieu ranked 6th out of 10 cities in Québec and 39th out of 54 in Canada as of 2020.

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

What about similarly populated cities?

• Einme, Myanmar
• Makein, Egypt
• Gyeongju-si, South Korea
• Lukou, China
• Mogi Mirim, Brazil
• Inisa, Nigeria

In new street additions, Saint-Jean-sur-Richelieu built increasingly disconnected streets over time, while Einme built increasingly disconnected streets from 1975 through 1976-1990, then improved and Lukou built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Einme and Lukou both grew more disconnected from 1975 through 1991-2005, then improved, while Saint-Jean-sur-Richelieu became progressively more disconnected. Notably, Saint-Jean-sur-Richelieu had a more sprawly network than Lukou in 1975 but the two have since reversed their relative ranking.