Ambovombe in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ambovombe plotted against Toliary and Madagascar. While Toliary and Madagascar both rose steadily, Ambovombe's new street additions rose steadily. Most recently, Ambovombe's incremental SNDi rose from 2.66 to 3.42 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ambovombe ranked 1st out of 5 cities in Toliary and 4th out of 21 in Madagascar as of 2020.

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

What about similarly populated cities?

• Bandırma, Turkey
• Cangxi County, China
• Mishan, China
• Gia Kiệm, Vietnam
• Keshod, India
• Hitachinaka, Japan

In new street additions, Ambovombe and Bandırma both built increasingly disconnected streets over time, while Gia Kiệm built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Ambovombe and Bandırma both became progressively more disconnected, while Gia Kiệm became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Ambovombe and Bandırma have been growing further apart in their street-network character since 1975.