Al Jarrahi in context: Street-network sprawl trends

Al Jarrahi in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
Al JarrahiAl Hudaydah (Region)Yemen (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Al Jarrahi plotted against Al Hudaydah and Yemen. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Al Jarrahi's incremental SNDi rose from 2.32 to 2.73 between 1991-2005 and 2006-2020. In terms of the aggregate network, Al Jarrahi ranked 3rd out of 8 cities in Al Hudaydah and 6th out of 58 in Yemen as of 2020.

New Street Additions (2006–2020)

SNDi value
2.73
Rank in Yemen
6th of 58
Rank in Al Hudaydah
4th of 8

Entire Network (Aggregate)

SNDi value
2.26
Rank in Yemen
6th of 58
Rank in Al Hudaydah
3rd of 8

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
Al JarrahiSalmasSimi Valley

In new street additions, Al Jarrahi fluctuated in its street-construction patterns, while Salmas built increasingly disconnected streets over time and Simi Valley built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Notably, Al Jarrahi had a more connected network than Salmas in 1975 but the two have since reversed their relative ranking.