Port Louis in context: Street-network sprawl trends

Port Louis in context

33.544.5<19751976–19901991–20052006–2020SNDi of street additions
33.544.5<19751976–19901991–20052006–2020SNDi of entire street network
Port LouisPlaines Wilhems (Region)Mauritius (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Port Louis plotted against Plaines Wilhems and Mauritius. The SNDi of new construction in Port Louis peaked in 1976-1990, compared to Plaines Wilhems which peaked in 1991-2005 and Mauritius which rose steadily. Most recently, Port Louis's incremental SNDi fell from 4.2 to 4.1 between 1991-2005 and 2006-2020. In terms of the aggregate network, Port Louis ranked 1st out of 1 cities in Plaines Wilhems and 1st out of 1 in Mauritius as of 2020.

New Street Additions (2006–2020)

SNDi value
4.1
Rank in Mauritius
1st of 1
Rank in Plaines Wilhems
1st of 1

Entire Network (Aggregate)

SNDi value
3.44
Rank in Mauritius
1st of 1
Rank in Plaines Wilhems
1st of 1

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

What about similarly populated cities?

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
Port LouisBulawayoOttawa

In new street additions, Port Louis and Ottawa both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Bulawayo built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Port Louis and Bulawayo have been growing further apart in their street-network character since 1975.