Jemmal 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 Jemmal plotted against Monastir and Tunisia. The SNDi of new construction in Jemmal was at its lowest in 1991-2005, compared to Monastir which followed a zig-zag trend with an overall increase and Tunisia which peaked in 1976-1990. Most recently, Jemmal's incremental SNDi rose from 1.57 to 1.77 between 1991-2005 and 2006-2020. In terms of the aggregate network, Jemmal ranked 2nd out of 3 cities in Monastir and 5th out of 24 in Tunisia as of 2020.

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

What about similarly populated cities?

• Kwa Ibo, Nigeria
• Caleta Olivia, Argentina
• Jalaquduq, Uzbekistan
• Daliyat al-Karmel, Israel
• Zhenwen, China
• Okpogho, Nigeria

In new street additions, Jemmal built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Kwa Ibo fluctuated in its street-construction patterns and Daliyat al-Karmel built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Kwa Ibo and Daliyat al-Karmel both became progressively more disconnected, while Jemmal became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Jemmal and Daliyat al-Karmel have been growing further apart in their street-network character since 1975.