The level of street-network sprawl in new development in Ilocos Norte followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Ilocos Norte, we can consider one of its most populous cities: Laoag. Disconnectivity in the most populous cities in Ilocos Norte follow the same region trend.

How do development practices in Ilocos Norte fare in comparison to others in Philippines? Most recently in 2006-2020, street construction in Ilocos Norte was the 17th-most disconnected out of the 57 regions in Philippines. Its position in the ranks since 1975 has fallen; relative to other regions in Philippines, street construction in Ilocos Norte has become more connected. Ilocos Norte ranked 2nd in 1975, 18th in 1976-1990, 14th in 1991-2005 and 17th in 2006-2020.

As of 2020, the city with the most disconnected street network in Ilocos Norte is Laoag with an SNDi of 3.12, which is moderately connected. Conversely, the most connected city is Laoag with an SNDi of 3.12, which is moderately connected. See trends for these cities: Laoag, Laoag

The level of street-network sprawl in the aggregate network in Ilocos Norte rose steadily. To get a sense of how the aggregate street network has changed in Ilocos Norte, we can consider one of its most populous cities: Laoag. Disconnectivity in the most populous cities in Ilocos Norte follow the same region trend.

To date, Ilocos Norte is the 3rd-most disconnected out of the 57 regions in Philippines. Its position in the ranks since 1975 has fallen; relative to other regions in Philippines, the street network in Ilocos Norte has become more connected. Ilocos Norte ranked 2nd in 1975, 6th in 1976-1990, 5th in 1991-2005 and 3rd in 2006-2020.