Tallinn in context: Street-network sprawl trends

Tallinn in context

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
TallinnHarju (Region)Estonia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tallinn plotted against Harju and Estonia. While Harju and Estonia both rose steadily, Tallinn's new street additions rose steadily. Most recently, Tallinn's incremental SNDi rose from 1.75 to 2.42 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tallinn ranked 1st out of 1 cities in Harju and 1st out of 2 in Estonia as of 2020.

New Street Additions (2006–2020)

SNDi value
2.42
Rank in Estonia
1st of 2
Rank in Harju
1st of 1

Entire Network (Aggregate)

SNDi value
1.49
Rank in Estonia
1st of 2
Rank in Harju
1st of 1

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

What about similarly populated cities?

1.21.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
TallinnAl-KutAmericana

In new street additions, Tallinn and Al-Kut both built increasingly disconnected streets over time, while Americana fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Tallinn and Al-Kut have been growing further apart in their street-network character since 1975.