Zirbi in context: Street-network sprawl trends

Zirbi in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
ZirbiAl Fayyum (Region)Egypt (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zirbi plotted against Al Fayyum and Egypt. The SNDi of new construction in Zirbi rose steadily, compared to Al Fayyum which peaked in 1976-1990 and Egypt which followed a zig-zag trend with an overall increase. Most recently, Zirbi's incremental SNDi rose from 5.82 to 6.45 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zirbi ranked 11th out of 13 cities in Al Fayyum and 170th out of 213 in Egypt as of 2020.

New Street Additions (2006–2020)

SNDi value
6.45
Rank in Egypt
177th of 213
Rank in Al Fayyum
10th of 13

Entire Network (Aggregate)

SNDi value
4.75
Rank in Egypt
170th of 213
Rank in Al Fayyum
11th of 13

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
ZirbiDouaiPisa

In new street additions, Zirbi and Douai both built increasingly disconnected streets over time, while Pisa fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Zirbi and Douai have been growing further apart in their street-network character since 1975.