Madang in context: Street-network sprawl trends

Madang in context

681012<19751976–19901991–20052006–2020SNDi of street additions
681012<19751976–19901991–20052006–2020SNDi of entire street network
MadangPapua New Guinea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Madang plotted against Papua New Guinea. Both Madang and Papua New Guinea follow the same trend. Most recently, Madang's incremental SNDi rose from 9.01 to 12.01 between 1991-2005 and 2006-2020. In terms of the aggregate network, Madang ranked 6th out of 10 in Papua New Guinea as of 2020.

New Street Additions (2006–2020)

SNDi value
12.01
Rank in Papua New Guinea
10th of 10

Entire Network (Aggregate)

SNDi value
6.15
Rank in Papua New Guinea
6th of 10

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

What about similarly populated cities?

36912<19751976–19901991–20052006–2020SNDi of street additions
36912<19751976–19901991–20052006–2020SNDi of entire street network
MadangDangtuLao Cai

In new street additions, Madang built increasingly disconnected streets over time, while Dangtu built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Lào Cai built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Madang became progressively more disconnected, while Dangtu became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Lào Cai became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Madang and Lào Cai have been growing further apart in their street-network character since 1975.