Antetezambaro 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 Antetezambaro plotted against Toamasina and Madagascar. The SNDi of new construction in Antetezambaro peaked in 1991-2005, compared to Toamasina which rose steadily and Madagascar which rose steadily. Most recently, Antetezambaro's incremental SNDi fell from 29.02 to 11.88 between 1991-2005 and 2006-2020. In terms of the aggregate network, Antetezambaro ranked 3rd out of 3 cities in Toamasina and 21st 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?

• Chhatrapur, India
• Vihiga, Kenya
• Qixian, China
• Ambaji, India
• Samalkha, India
• Kitami, Japan

While Chhatrapur and Ambaji both built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, Antetezambaro built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full network, Antetezambaro grew more disconnected from 1975 through 1991-2005, then improved, while Chhatrapur became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Ambaji became progressively more connected. Notably, Antetezambaro had a more connected network than Chhatrapur in 1975 but the two have since reversed their relative ranking.