Erie in context: Street-network sprawl trends
Erie in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Erie plotted against Pennsylvania and United States. The SNDi of new construction in Erie rose steadily, compared to Pennsylvania which rose steadily and United States which peaked in 1991-2005. Most recently, Erie's incremental SNDi rose from 3.31 to 6.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Erie ranked 3rd out of 16 cities in Pennsylvania and 15th out of 333 in United States as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 6.64
- Rank in United States
- 315th of 333
- Rank in Pennsylvania
- 16th of 16
Entire Network (Aggregate)
- SNDi value
- 1.74
- Rank in United States
- 15th of 333
- Rank in Pennsylvania
- 3rd of 16
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Samarlakota, India
- Nawabganj, India
- Tirukkovilur, India
- Teresópolis, Brazil
- Zwolle, Netherlands
- Al-Qobabat, Egypt
In new street additions, Erie and Teresópolis both built increasingly disconnected streets over time, while Samarlakota fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Erie and Samarlakota have been growing further apart in their street-network character since 1975.