Libreville in context: Street-network sprawl trends

Libreville in context

5678<19751976–19901991–20052006–2020SNDi of street additions
5678<19751976–19901991–20052006–2020SNDi of entire street network
LibrevilleEstuaire (Region)Gabon (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Libreville plotted against Estuaire and Gabon. The SNDi of new construction in Libreville peaked in 1991-2005, compared to Estuaire which peaked in 1991-2005 and Gabon which peaked in 1976-1990. Most recently, Libreville's incremental SNDi fell from 7.99 to 6.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Libreville ranked 1st out of 1 cities in Estuaire and 4th out of 5 in Gabon as of 2020.

New Street Additions (2006–2020)

SNDi value
6.85
Rank in Gabon
3rd of 5
Rank in Estuaire
1st of 1

Entire Network (Aggregate)

SNDi value
6.11
Rank in Gabon
4th of 5
Rank in Estuaire
1st of 1

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
LibrevilleMeknesMakhachkala

In new street additions, Libreville built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Meknes fluctuated in its street-construction patterns and Makhachkala built increasingly disconnected streets over time. For the full network, Libreville and Makhachkala both became progressively more disconnected, while Meknes grew more disconnected from 1975 through 1976-1990, then improved. Libreville and Makhachkala have been converging in their street-network character since 1975.