Piedras Negras in context: Street-network sprawl trends
Piedras Negras in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Piedras Negras plotted against Coahuila and México. The SNDi of new construction in Piedras Negras peaked in 1991-2005, compared to Coahuila which followed a zig-zag trend with an overall increase and México which followed a zig-zag trend with an overall increase. Most recently, Piedras Negras's incremental SNDi fell from 2.08 to 1.99 between 1991-2005 and 2006-2020. In terms of the aggregate network, Piedras Negras ranked 2nd out of 7 cities in Coahuila and 17th out of 182 in México as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 1.99
- Rank in México
- 13th of 182
- Rank in Coahuila
- 2nd of 7
Entire Network (Aggregate)
- SNDi value
- 1.73
- Rank in México
- 17th of 182
- Rank in Coahuila
- 2nd of 7
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
While Cabudare and Arad both built increasingly disconnected streets over time, Piedras Negras built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Piedras Negras and Cabudare have been growing further apart in their street-network character since 1975.