Comparisons
Ilocos Sur vs. the other two most closely populated regions in Philippines: Ilocos Norte and Isabela
Ilocos Sur in context: Street-network sprawl of new development
The level of street-network sprawl in new development in Ilocos Sur followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Ilocos Sur, we can consider one of its most populous cities: Vigan. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Vigan peaked in 1991-2005.
How do development practices in Ilocos Sur fare in comparison to others in Philippines? Most recently in 2006-2020, street construction in Ilocos Sur was the 35th-most disconnected out of the 57 regions in Philippines. Its position in the ranks since 1975 has not changed. Ilocos Sur ranked 35th in 1975, 36th in 1976-1990, 28th in 1991-2005 and 35th in 2006-2020.
Ilocos Sur in context: Aggregate street-network sprawl
As of 2020, the city with the most disconnected street network in Ilocos Sur is Vigan with an SNDi of 4.8, which is sprawly. Conversely, the most connected city is Vigan with an SNDi of 4.8, which is sprawly. See trends for these cities: Vigan, Vigan
The level of street-network sprawl in the aggregate network in Ilocos Sur rose steadily. To get a sense of how the aggregate street network has changed in Ilocos Sur, we can consider one of its most populous cities: Vigan. Disconnectivity in the most populous cities in Ilocos Sur follow the same region trend.
To date, Ilocos Sur is the 33rd-most disconnected out of the 57 regions in Philippines. Its position in the ranks since 1975 has risen; relative to other regions in Philippines, the street network in Ilocos Sur has become more disconnected. Ilocos Sur ranked 35th in 1975, 38th in 1976-1990, 35th in 1991-2005 and 33rd in 2006-2020.