Al Hidab in context: Street-network sprawl trends

Al Hidab in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
Al HidabSa`dah (Region)Yemen (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Al Hidab plotted against Sa`dah and Yemen. The SNDi of new construction in Al Hidab peaked in 1991-2005, compared to Sa`dah which followed a zig-zag trend with an overall increase and Yemen which followed a zig-zag trend with an overall increase. Most recently, Al Hidab's incremental SNDi fell from 4.03 to 3.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, Al Hidab ranked 2nd out of 3 cities in Sa`dah and 31st out of 58 in Yemen as of 2020.

New Street Additions (2006–2020)

SNDi value
3.46
Rank in Yemen
14th of 58
Rank in Sa`dah
1st of 3

Entire Network (Aggregate)

SNDi value
3.81
Rank in Yemen
31st of 58
Rank in Sa`dah
2nd of 3

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

What about similarly populated cities?

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
Al HidabAjibarangMwinilunga

In new street additions, Al Hidab and Ajibarang both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Mwinilunga built increasingly disconnected streets over time. Looking at the full network, Ajibarang and Mwinilunga both became progressively more disconnected, while Al Hidab grew more disconnected from 1975 through 1991-2005, then improved.