The level of street-network sprawl in new development in Wallonie rose steadily. To get a sense of how street development has changed in Wallonie, we can consider three of its most populous cities: Liège, Charleroi and La Louvière. Out of the three cities, Liège and Charleroi do not follow the same trend as the region. The level of street-network sprawl in new development in Liège peaked in 1991-2005. The level of street-network sprawl in new development in Charleroi peaked in 1991-2005.

As of 2020, the city with the most disconnected street network in Wallonie is Namur with an SNDi of 2.44, which is relatively well-connected. Conversely, the most connected city is Frameries with an SNDi of 2.16, which is well-connected. See trends for these cities: Frameries, Namur

The level of street-network sprawl in the aggregate network in Wallonie rose steadily. To get a sense of how the aggregate street network has changed in Wallonie, we can consider three of its most populous cities: Liège, Charleroi and La Louvière. Disconnectivity in the most populous cities in Wallonie follow the same region trend.