Zarzis in context: Street-network sprawl trends

Zarzis in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
ZarzisMedenine (Region)Tunisia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zarzis plotted against Médenine and Tunisia. The SNDi of new construction in Zarzis fell steadily, compared to Médenine which peaked in 1976-1990 and Tunisia which peaked in 1976-1990. Most recently, Zarzis's incremental SNDi fell from 5.09 to 4.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zarzis ranked 2nd out of 2 cities in Médenine and 24th out of 24 in Tunisia as of 2020.

New Street Additions (2006–2020)

SNDi value
4.18
Rank in Tunisia
24th of 24
Rank in Médenine
2nd of 2

Entire Network (Aggregate)

SNDi value
5.16
Rank in Tunisia
24th of 24
Rank in Médenine
2nd of 2

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
ZarzisGoureTramandai

In new street additions, Zarzis built increasingly connected streets over time, while Gouré built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Tramandaí fluctuated in its street-construction patterns. For the full network, Zarzis became progressively more connected, while Gouré became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Tramandaí became progressively more disconnected.