Ambatolahy II in context: Street-network sprawl trends

Ambatolahy II in context

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
Ambatolahy IIFianarantsoa (Region)Madagascar (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ambatolahy II plotted against Fianarantsoa and Madagascar. The SNDi of new construction in Ambatolahy II peaked in 1991-2005, compared to Fianarantsoa which followed a zig-zag trend with an overall increase and Madagascar which rose steadily. Most recently, Ambatolahy II's incremental SNDi fell from 7.76 to 6.52 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ambatolahy II ranked 3rd out of 3 cities in Fianarantsoa and 18th out of 21 in Madagascar as of 2020.

New Street Additions (2006–2020)

SNDi value
6.52
Rank in Madagascar
16th of 21
Rank in Fianarantsoa
3rd of 3

Entire Network (Aggregate)

SNDi value
6.83
Rank in Madagascar
18th of 21
Rank in Fianarantsoa
3rd of 3

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
Ambatolahy IIKuytunRenhuai

In new street additions, Ambatolahy II and Kuytun both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Renhuai built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Ambatolahy II became progressively more disconnected, while Kuytun grew more disconnected from 1975 through 1991-2005, then improved and Renhuai grew more disconnected from 1975 through 1976-1990, then improved. Ambatolahy II and Kuytun have been growing further apart in their street-network character since 1975.