Drammen in context: Street-network sprawl trends

Drammen in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
DrammenBuskerud (Region)Norway (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Drammen plotted against Buskerud and Norway. The SNDi of new construction in Drammen peaked in 1976-1990, compared to Buskerud which rose steadily and Norway which rose steadily. Most recently, Drammen's incremental SNDi fell from 3.24 to 2.95 between 1991-2005 and 2006-2020. In terms of the aggregate network, Drammen ranked 1st out of 1 cities in Buskerud and 3rd out of 8 in Norway as of 2020.

New Street Additions (2006–2020)

SNDi value
2.95
Rank in Norway
3rd of 8
Rank in Buskerud
1st of 1

Entire Network (Aggregate)

SNDi value
2.53
Rank in Norway
3rd of 8
Rank in Buskerud
1st of 1

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

What about similarly populated cities?

0.81.62.43.2<19751976–19901991–20052006–2020SNDi of street additions
0.81.62.43.2<19751976–19901991–20052006–2020SNDi of entire street network
DrammenLiquUngwan Tamowa

In new street additions, Drammen built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Liqu fluctuated in its street-construction patterns and Ungwan Tamowa built increasingly disconnected streets over time. For the full network, Drammen and Ungwan Tamowa both became progressively more disconnected, while Liqu fluctuated in connectivity. Drammen and Liqu have been converging in their street-network character since 1975.