San in context: Street-network sprawl trends

San in context

0.81.62.43.2<19751976–19901991–20052006–2020SNDi of street additions
0.81.62.43.2<19751976–19901991–20052006–2020SNDi of entire street network
SanSegou (Region)Mali (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with San plotted against Ségou and Mali. The SNDi of new construction in San rose steadily, compared to Ségou which peaked in 1976-1990 and Mali which followed a zig-zag trend with an overall increase. Most recently, San's incremental SNDi rose from 1.35 to 1.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, San ranked 1st out of 3 cities in Ségou and 1st out of 22 in Mali as of 2020.

New Street Additions (2006–2020)

SNDi value
1.46
Rank in Mali
2nd of 22
Rank in Ségou
2nd of 3

Entire Network (Aggregate)

SNDi value
1.16
Rank in Mali
1st of 22
Rank in Ségou
1st of 3

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

What about similarly populated cities?

0369<19751976–19901991–20052006–2020SNDi of street additions
0369<19751976–19901991–20052006–2020SNDi of entire street network
SanAshfordGazipur

In new street additions, San built increasingly disconnected streets over time, while Ashford built increasingly disconnected streets from 1975 through 1991-2005, then improved and Gazipur built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, San and Ashford both became progressively more disconnected, while Gazipur became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. San and Gazipur have been converging in their street-network character since 1975.