The level of street-network sprawl in new development in Sơn La was at its lowest in 1976-1990. To get a sense of how street development has changed in Sơn La, we can consider two of its most populous cities: Sơn La and Phù Yên. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Sơn La followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Phù Yên rose steadily.

How do development practices in Sơn La fare in comparison to others in Vietnam? Most recently in 2006-2020, street construction in Sơn La was the 52nd-most disconnected out of the 58 regions in Vietnam. Its position in the ranks since 1975 has risen; relative to other regions in Vietnam, street construction in Sơn La has become more disconnected. Sơn La ranked 54th in 1975, 50th in 1976-1990, 56th in 1991-2005 and 52nd in 2006-2020.

As of 2020, the city with the most disconnected street network in Sơn La is Sơn La with an SNDi of 4.96, which is very sprawly. Conversely, the most connected city is Phù Yên with an SNDi of 4.26, which is sprawly. See trends for these cities: Phù Yên, Sơn La

The level of street-network sprawl in the aggregate network in Sơn La was at its lowest in 1991-2005. To get a sense of how the aggregate street network has changed in Sơn La, we can consider two of its most populous cities: Sơn La and Phù Yên. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Sơn La followed a zig-zag trend with an overall increase. The level of street-network sprawl in the aggregate network in Phù Yên rose steadily.

To date, Sơn La is the 54th-most disconnected out of the 58 regions in Vietnam. Its position in the ranks since 1975 has not changed. Sơn La ranked 54th in 1975, 53rd in 1976-1990, 55th in 1991-2005 and 54th in 2006-2020.