Portmore in context: Street-network sprawl trends
Portmore in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Portmore plotted against Saint Catherine and Jamaica. The SNDi of new construction in Portmore followed a zig-zag trend with an overall increase, compared to Saint Catherine which rose steadily and Jamaica which rose steadily. Most recently, Portmore's incremental SNDi rose from 5.42 to 5.89 between 1991-2005 and 2006-2020. In terms of the aggregate network, Portmore ranked 1st out of 2 cities in Saint Catherine and 3rd out of 6 in Jamaica as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 5.89
- Rank in Jamaica
- 2nd of 6
- Rank in Saint Catherine
- 1st of 2
Entire Network (Aggregate)
- SNDi value
- 4.96
- Rank in Jamaica
- 3rd of 6
- Rank in Saint Catherine
- 1st of 2
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Portmore and Shouguang both fluctuated in its street-construction patterns, while Sikar built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend.