The level of street-network sprawl in new development in Tongatapu rose steadily. To get a sense of how street development has changed in Tongatapu, we can consider one of its most populous cities: Nuku'alofa. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Nuku'alofa followed a zig-zag trend with an overall increase.

As of 2020, the city with the most disconnected street network in Tongatapu is Nuku'alofa with an SNDi of 4.07, which is sprawly. Conversely, the most connected city is Nuku'alofa with an SNDi of 4.07, which is sprawly. See trends for these cities: Nuku'alofa, Nuku'alofa

The level of street-network sprawl in the aggregate network in Tongatapu rose steadily. To get a sense of how the aggregate street network has changed in Tongatapu, we can consider one of its most populous cities: Nuku'alofa. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Nuku'alofa followed a zig-zag trend with an overall increase.