Tartu in context: Street-network sprawl trends

Tartu in context

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
TartuEstonia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tartu plotted against Estonia. Both Tartu and Estonia follow the same trend. Most recently, Tartu's incremental SNDi rose from 2.03 to 2.42 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tartu ranked 2nd out of 2 in Estonia as of 2020.

New Street Additions (2006–2020)

SNDi value
2.42
Rank in Estonia
2nd of 2

Entire Network (Aggregate)

SNDi value
1.72
Rank in Estonia
2nd of 2

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

What about similarly populated cities?

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
TartuRankLancaster

In new street additions, Tartu built increasingly disconnected streets over time, while Rank built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Lancaster built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Tartu and Lancaster both became progressively more disconnected, while Rank became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Tartu had a more sprawly network than Lancaster in 1975 but the two have since reversed their relative ranking.