Trondheim in context: Street-network sprawl trends

Trondheim 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
TrondheimSor-Trondelag (Region)Norway (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Trondheim plotted against Sør-Trøndelag and Norway. While Sør-Trøndelag and Norway both rose steadily, Trondheim's new street additions rose steadily. Most recently, Trondheim's incremental SNDi rose from 2.59 to 3.06 between 1991-2005 and 2006-2020. In terms of the aggregate network, Trondheim ranked 1st out of 1 cities in Sør-Trøndelag and 2nd out of 8 in Norway as of 2020.

New Street Additions (2006–2020)

SNDi value
3.06
Rank in Norway
4th of 8
Rank in Sør-Trøndelag
1st of 1

Entire Network (Aggregate)

SNDi value
2.51
Rank in Norway
2nd of 8
Rank in Sør-Trøndelag
1st of 1

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

What about similarly populated cities?

071421<19751976–19901991–20052006–2020SNDi of street additions
071421<19751976–19901991–20052006–2020SNDi of entire street network
TrondheimGarhi HabibullahTazumoddin

In new street additions, Trondheim built increasingly disconnected streets over time, while Garhi Habibullah fluctuated in its street-construction patterns and Tazumoddin fluctuated in its street-construction patterns. For the full network, Trondheim became progressively more disconnected, while Garhi Habibullah fluctuated in connectivity and Tazumoddin became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Trondheim had a more sprawly network than Garhi Habibullah in 1975 but the two have since reversed their relative ranking.