Sinko 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 Sinko plotted against Nzérékoré and Guinea. The SNDi of new construction in Sinko peaked in 1991-2005, compared to Nzérékoré which rose steadily and Guinea which rose steadily. Most recently, Sinko's incremental SNDi fell from 7.09 to 6.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sinko ranked 2nd out of 5 cities in Nzérékoré and 18th out of 24 in Guinea as of 2020.

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

What about similarly populated cities?

• Bondo, Democratic Republic of the Congo
• Lanshan, China
• Damagum, Nigeria
• Gaolong, China
• Bomadi, Nigeria
• Mankapur, India

In new street additions, Sinko and Bondo both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Gaolong fluctuated in its street-construction patterns. For the full network, Sinko and Bondo both became progressively more disconnected, while Gaolong became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Sinko and Bondo have been growing further apart in their street-network character since 1975.