Heemskerk in context: Street-network sprawl trends

Heemskerk in context

2.12.42.73<19751976–19901991–20052006–2020SNDi of street additions
2.12.42.73<19751976–19901991–20052006–2020SNDi of entire street network
HeemskerkNoord-Holland (Region)Netherlands (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Heemskerk plotted against Noord-Holland and Netherlands. The SNDi of new construction in Heemskerk peaked in 1976-1990, compared to Noord-Holland which rose steadily and Netherlands which peaked in 1991-2005. Most recently, Heemskerk's incremental SNDi fell from 2.32 to 2.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Heemskerk ranked 8th out of 9 cities in Noord-Holland and 39th out of 43 in Netherlands as of 2020.

New Street Additions (2006–2020)

SNDi value
2.25
Rank in Netherlands
24th of 43
Rank in Noord-Holland
3rd of 9

Entire Network (Aggregate)

SNDi value
2.38
Rank in Netherlands
39th of 43
Rank in Noord-Holland
8th of 9

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

What about similarly populated cities?

369<19751976–19901991–20052006–2020SNDi of street additions
369<19751976–19901991–20052006–2020SNDi of entire street network
HeemskerkSittweNyunzu

In new street additions, Heemskerk built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Sittwe built increasingly disconnected streets over time and Nyunzu built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Sittwe and Nyunzu both became progressively more disconnected, while Heemskerk grew more disconnected from 1975 through 1976-1990, then improved. Heemskerk and Sittwe have been growing further apart in their street-network character since 1975.