Zonguldak 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 Zonguldak plotted against Zinguldak and Turkey. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Zonguldak's incremental SNDi rose from 6.23 to 6.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zonguldak ranked 3rd out of 3 cities in Zinguldak and 174th out of 174 in Turkey as of 2020.

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

What about similarly populated cities?

• Jintang, China
• Lalamusa, Pakistan
• Mouping, China
• Baraiyarhat, Bangladesh
• Mweka, Democratic Republic of the Congo
• Abua, Nigeria

In new street additions, Zonguldak fluctuated in its street-construction patterns, while Jintang built increasingly disconnected streets from 1975 through 1976-1990, then improved and Baraiyarhat built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Zonguldak and Jintang both became progressively more disconnected, while Baraiyarhat became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards.