As Sayyid in context: Street-network sprawl trends

As Sayyid in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
As SayyidIbb (Region)Yemen (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with As Sayyid plotted against Ibb and Yemen. The SNDi of new construction in As Sayyid peaked in 1976-1990, compared to Ibb which followed a zig-zag trend with an overall increase and Yemen which followed a zig-zag trend with an overall increase. Most recently, As Sayyid's incremental SNDi fell from 2.98 to 2.89 between 1991-2005 and 2006-2020. In terms of the aggregate network, As Sayyid ranked 1st out of 7 cities in Ibb and 16th out of 58 in Yemen as of 2020.

New Street Additions (2006–2020)

SNDi value
2.89
Rank in Yemen
8th of 58
Rank in Ibb
1st of 7

Entire Network (Aggregate)

SNDi value
3.12
Rank in Yemen
16th of 58
Rank in Ibb
1st of 7

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
As SayyidPardisTermez

In new street additions, As Sayyid built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Pardis built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Termez built increasingly disconnected streets over time. For the full network, As Sayyid grew more disconnected from 1975 through 1976-1990, then improved, while Pardis became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Termez became progressively more disconnected.