Ceyhan 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 Ceyhan plotted against Adana and Turkey. The SNDi of new construction in Ceyhan peaked in 1991-2005, compared to Adana which followed a zig-zag trend with an overall decrease and Turkey which followed a zig-zag trend with an overall increase. Most recently, Ceyhan's incremental SNDi fell from 1.82 to 1.47 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ceyhan ranked 1st out of 6 cities in Adana and 21st 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?

• Ullapara, Bangladesh
• Sira, India
• Tengchong, China
• Tanjung Redeb, Indonesia
• Mora, Cameroon
• Jagatpur, India

In new street additions, Ceyhan built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Ullapara built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Tanjung Redeb fluctuated in its street-construction patterns. For the full network, Ceyhan grew more disconnected from 1975 through 1991-2005, then improved, while Ullapara became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Tanjung Redeb became progressively more disconnected.