Osaki 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 Osaki plotted against Miyagi and Japan. The SNDi of new construction in Osaki peaked in 1976-1990, compared to Miyagi which peaked in 1976-1990 and Japan which followed a zig-zag trend with an overall increase. Most recently, Osaki's incremental SNDi fell from 3.45 to 3.27 between 1991-2005 and 2006-2020. In terms of the aggregate network, Osaki ranked 4th out of 4 cities in Miyagi and 121st out of 135 in Japan as of 2020.

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

What about similarly populated cities?

• São Roque, Brazil
• Fracc Villas del Real 2da Seccion, México
• Changxing, China
• Bhit Shah, Pakistan
• Mielec, Poland
• Milas, Turkey

In new street additions, Osaki built increasingly disconnected streets from 1975 through 1976-1990, then improved, while São Roque built increasingly disconnected streets over time and Bhit Shah fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Notably, Osaki had a more sprawly network than São Roque in 1975 but the two have since reversed their relative ranking.