Tulcán in context: Street-network sprawl trends

Tulcan in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
TulcanCarchi (Region)Ecuador (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tulcán plotted against Carchi and Ecuador. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tulcán's incremental SNDi rose from 2.11 to 3.3 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tulcán ranked 1st out of 1 cities in Carchi and 9th out of 34 in Ecuador as of 2020.

New Street Additions (2006–2020)

SNDi value
3.3
Rank in Ecuador
22nd of 34
Rank in Carchi
1st of 1

Entire Network (Aggregate)

SNDi value
2.07
Rank in Ecuador
9th of 34
Rank in Carchi
1st of 1

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
TulcanDibaya-LubweMopeia

In new street additions, Tulcán and Dibaya-Lubwe both fluctuated in its street-construction patterns, while Mopeia built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Tulcán and Mopeia both became progressively more disconnected, while Dibaya-Lubwe grew more disconnected from 1975 through 1976-1990, then improved. Notably, Tulcán had a more sprawly network than Mopeia in 1975 but the two have since reversed their relative ranking.