Porto-Novo in context: Street-network sprawl trends

Porto-Novo in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
Porto-NovoOueme (Region)Benin (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Porto-Novo plotted against Ouémé and Benin. The SNDi of new construction in Porto-Novo rose steadily, compared to Ouémé which rose steadily and Benin which followed a zig-zag trend with an overall increase. Most recently, Porto-Novo's incremental SNDi rose from 3.25 to 3.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Porto-Novo ranked 1st out of 1 cities in Ouémé and 8th out of 24 in Benin as of 2020.

New Street Additions (2006–2020)

SNDi value
3.49
Rank in Benin
20th of 24
Rank in Ouémé
1st of 1

Entire Network (Aggregate)

SNDi value
2.05
Rank in Benin
8th of 24
Rank in Ouémé
1st of 1

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

What about similarly populated cities?

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
Porto-NovoOkaraShangqiu

Porto-Novo, Okara, and Shangqiu all built increasingly disconnected streets over time in new street construction. The same pattern holds for the full street network.