Purmerend in context: Street-network sprawl trends

Purmerend in context

22.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
PurmerendNoord-Holland (Region)Netherlands (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Purmerend plotted against Noord-Holland and Netherlands. The SNDi of new construction in Purmerend followed a zig-zag trend with an overall increase, compared to Noord-Holland which rose steadily and Netherlands which peaked in 1991-2005. Most recently, Purmerend's incremental SNDi rose from 1.98 to 3.15 between 1991-2005 and 2006-2020. In terms of the aggregate network, Purmerend ranked 7th out of 9 cities in Noord-Holland and 36th out of 43 in Netherlands as of 2020.

New Street Additions (2006–2020)

SNDi value
3.15
Rank in Netherlands
38th of 43
Rank in Noord-Holland
8th of 9

Entire Network (Aggregate)

SNDi value
2.17
Rank in Netherlands
36th of 43
Rank in Noord-Holland
7th of 9

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

What about similarly populated cities?

1.62.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
PurmerendMohnyinShicheng

In new street additions, Purmerend and Shicheng both fluctuated in its street-construction patterns, while Mohnyin built increasingly disconnected streets over time. For the full network, Purmerend and Shicheng both fluctuated in connectivity, while Mohnyin became progressively more disconnected. Notably, Purmerend had a more sprawly network than Mohnyin in 1975 but the two have since reversed their relative ranking.