The level of street-network sprawl in new development in Toamasina rose steadily. To get a sense of how street development has changed in Toamasina, we can consider three of its most populous cities: Antsiramandroso, Antetezambaro and Toamasina. Out of the three cities, Antsiramandroso and Antetezambaro do not follow the same trend as the region. The level of street-network sprawl in new development in Antsiramandroso followed a zig-zag trend with an overall decrease. The level of street-network sprawl in new development in Antetezambaro peaked in 1991-2005.

As of 2020, the city with the most disconnected street network in Toamasina is Antetezambaro with an SNDi of 14.16, which is very sprawly. Conversely, the most connected city is Toamasina with an SNDi of 2.31, which is well-connected. See trends for these cities: Toamasina, Antetezambaro

The level of street-network sprawl in the aggregate network in Toamasina rose steadily. To get a sense of how the aggregate street network has changed in Toamasina, we can consider three of its most populous cities: Antsiramandroso, Antetezambaro and Toamasina. Out of the three cities, Antsiramandroso and Antetezambaro do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Antsiramandroso peaked in 1976-1990. The level of street-network sprawl in the aggregate network in Antetezambaro peaked in 1991-2005.