The level of street-network sprawl in new development in Saint-Louis peaked in 1991-2005. To get a sense of how street development has changed in Saint-Louis, we can consider two of its most populous cities: Saint-Louis and Richard-Toll. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Saint-Louis followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Richard-Toll followed a zig-zag trend with an overall increase.

How do development practices in Saint-Louis fare in comparison to others in Senegal? Most recently in 2006-2020, street construction in Saint-Louis was the 10th-most disconnected out of the 13 regions in Senegal. Its position in the ranks since 1975 has risen; relative to other regions in Senegal, street construction in Saint-Louis has become more disconnected. Saint-Louis ranked 12th in 1975, 13th in 1976-1990, 13th in 1991-2005 and 10th in 2006-2020.

As of 2020, the city with the most disconnected street network in Saint-Louis is Richard-Toll with an SNDi of 2.17, which is well-connected. Conversely, the most connected city is Saint-Louis with an SNDi of 2.11, which is well-connected. See trends for these cities: Saint-Louis, Richard-Toll

The level of street-network sprawl in the aggregate network in Saint-Louis rose steadily. To get a sense of how the aggregate street network has changed in Saint-Louis, we can consider two of its most populous cities: Saint-Louis and Richard-Toll. Out of the two cities, Richard-Toll does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Richard-Toll followed a zig-zag trend with an overall decrease.

To date, Saint-Louis is the 12th-most disconnected out of the 13 regions in Senegal. Its position in the ranks since 1975 has not changed. Saint-Louis ranked 12th in 1975, 12th in 1976-1990, 13th in 1991-2005 and 12th in 2006-2020.