The level of street-network sprawl in new development in Bío-Bío followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Bío-Bío, we can consider three of its most populous cities: Concepción, Chiguayante and Los Ángeles. Out of the three cities, Los Ángeles does not follow the same trend as the region. The level of street-network sprawl in new development in Los Ángeles rose steadily.

How do development practices in Bío-Bío fare in comparison to others in Chile? Most recently in 2006-2020, street construction in Bío-Bío was the 11th-most disconnected out of the 16 regions in Chile. Its position in the ranks since 1975 has fallen; relative to other regions in Chile, street construction in Bío-Bío has become more connected. Bío-Bío ranked 6th in 1975, 11th in 1976-1990, 12th in 1991-2005 and 11th in 2006-2020.

As of 2020, the city with the most disconnected street network in Bío-Bío is Chiguayante with an SNDi of 3.9, which is relatively sprawly. Conversely, the most connected city is Penco with an SNDi of 2.92, which is moderately connected. See trends for these cities: Penco, Chiguayante

The level of street-network sprawl in the aggregate network in Bío-Bío rose steadily. To get a sense of how the aggregate street network has changed in Bío-Bío, we can consider three of its most populous cities: Concepción, Chiguayante and Los Ángeles. Disconnectivity in the most populous cities in Bío-Bío follow the same region trend.

To date, Bío-Bío is the 11th-most disconnected out of the 16 regions in Chile. Its position in the ranks since 1975 has fallen; relative to other regions in Chile, the street network in Bío-Bío has become more connected. Bío-Bío ranked 6th in 1975, 7th in 1976-1990, 11th in 1991-2005 and 11th in 2006-2020.