Alphen aan den Rijn in context: Street-network sprawl trends

Alphen aan den Rijn in context

1.622.42.8<19751976–19901991–20052006–2020SNDi of street additions
1.622.42.8<19751976–19901991–20052006–2020SNDi of entire street network
Alphen aan den RijnZuid-Holland (Region)Netherlands (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Alphen aan den Rijn plotted against Zuid-Holland and Netherlands. The SNDi of new construction in Alphen aan den Rijn was at its lowest in 1976-1990, compared to Zuid-Holland which peaked in 1991-2005 and Netherlands which peaked in 1991-2005. Most recently, Alphen aan den Rijn's incremental SNDi rose from 1.83 to 2.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Alphen aan den Rijn ranked 1st out of 6 cities in Zuid-Holland and 15th out of 43 in Netherlands as of 2020.

New Street Additions (2006–2020)

SNDi value
2.05
Rank in Netherlands
13th of 43
Rank in Zuid-Holland
1st of 6

Entire Network (Aggregate)

SNDi value
1.77
Rank in Netherlands
15th of 43
Rank in Zuid-Holland
1st of 6

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
Alphen aan den RijnNanchaYongxin County

While Nancha and Yongxin County both fluctuated in its street-construction patterns, Alphen aan den Rijn built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns in new street additions. Looking at the full network, Nancha and Yongxin County both fluctuated in connectivity, while Alphen aan den Rijn became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Alphen aan den Rijn and Yongxin County have been converging in their street-network character since 1975.