Brazzaville in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Brazzaville plotted against Pool and Republic of the Congo. The SNDi of new construction in Brazzaville peaked in 1991-2005, compared to Pool which peaked in 1991-2005 and Republic of the Congo which peaked in 1976-1990. Most recently, Brazzaville's incremental SNDi fell from 6.7 to 5.44 between 1991-2005 and 2006-2020. In terms of the aggregate network, Brazzaville ranked 1st out of 1 cities in Pool and 6th out of 6 in Republic of the Congo as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Maracaibo, Venezuela
• Bhopal, India
• Denver, United States
• Harare, Zimbabwe
• Ludhiana, India
• Belém, Brazil

In new street additions, Brazzaville built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Maracaibo fluctuated in its street-construction patterns and Harare built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Brazzaville and Maracaibo have been growing further apart in their street-network character since 1975.