The level of street-network sprawl in new development in La Union rose steadily. To get a sense of how street development has changed in La Union, we can consider two of its most populous cities: San Fernando and Agoo. Out of the two cities, San Fernando does not follow the same trend as the region. The level of street-network sprawl in new development in San Fernando peaked in 1991-2005.

How do development practices in La Union fare in comparison to others in Philippines? Most recently in 2006-2020, street construction in La Union was the 54th-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 La Union has become more connected. La Union ranked 44th in 1975, 42nd in 1976-1990, 53rd in 1991-2005 and 54th in 2006-2020.

As of 2020, the city with the most disconnected street network in La Union is San Fernando with an SNDi of 5.95, which is very sprawly. Conversely, the most connected city is Agoo with an SNDi of 4.58, which is sprawly. See trends for these cities: Agoo, San Fernando

The level of street-network sprawl in the aggregate network in La Union rose steadily. To get a sense of how the aggregate street network has changed in La Union, we can consider two of its most populous cities: San Fernando and Agoo. Out of the two cities, San Fernando does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in San Fernando peaked in 1991-2005.

To date, La Union is the 48th-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 La Union has become more connected. La Union ranked 44th in 1975, 46th in 1976-1990, 47th in 1991-2005 and 48th in 2006-2020.