Port Moresby in context: Street-network sprawl trends

Port Moresby in context

56789<19751976–19901991–20052006–2020SNDi of street additions
56789<19751976–19901991–20052006–2020SNDi of entire street network
Port MoresbyNational Capital District (Region)Papua New Guinea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Port Moresby plotted against National Capital District and Papua New Guinea. The SNDi of new construction in Port Moresby peaked in 1991-2005, compared to National Capital District which rose steadily and Papua New Guinea which rose steadily. Most recently, Port Moresby's incremental SNDi fell from 8.61 to 8.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Port Moresby ranked 1st out of 1 cities in National Capital District and 4th out of 10 in Papua New Guinea as of 2020.

New Street Additions (2006–2020)

SNDi value
8.04
Rank in Papua New Guinea
5th of 10
Rank in National Capital District
1st of 1

Entire Network (Aggregate)

SNDi value
5.54
Rank in Papua New Guinea
4th of 10
Rank in National Capital District
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
Port MoresbyBayannurTaubate

In new street additions, Port Moresby and Bayannur both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Taubaté fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend.