The level of street-network sprawl in new development in Bretagne peaked in 1991-2005. To get a sense of how street development has changed in Bretagne, we can consider three of its most populous cities: Rennes, Brest and Lorient. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Rennes followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Brest followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Lorient rose steadily.

As of 2020, the city with the most disconnected street network in Bretagne is Lorient with an SNDi of 2.73, which is relatively well-connected. Conversely, the most connected city is Rennes with an SNDi of 1.87, which is very well-connected. See trends for these cities: Rennes, Lorient

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