Amparihimahitsy in context: Street-network sprawl trends
Amparihimahitsy in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Amparihimahitsy plotted against Mahajanga and Madagascar. The SNDi of new construction in Amparihimahitsy was at its lowest in 1991-2005, compared to Mahajanga which rose steadily and Madagascar which rose steadily. Most recently, Amparihimahitsy's incremental SNDi rose from 2.43 to 2.75 between 1991-2005 and 2006-2020. In terms of the aggregate network, Amparihimahitsy ranked 2nd out of 3 cities in Mahajanga and 11th out of 21 in Madagascar as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 2.75
- Rank in Madagascar
- 4th of 21
- Rank in Mahajanga
- 1st of 3
Entire Network (Aggregate)
- SNDi value
- 3.77
- Rank in Madagascar
- 11th of 21
- Rank in Mahajanga
- 2nd of 3
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Amparihimahitsy built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Igboho built increasingly disconnected streets over time and Weining built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Igboho and Weining both became progressively more disconnected, while Amparihimahitsy grew more disconnected from 1975 through 1976-1990, then improved. Notably, Amparihimahitsy had a more sprawly network than Weining in 1975 but the two have since reversed their relative ranking.