Langley City in context: Street-network sprawl trends

Langley City in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
Langley CityBritish Columbia (Region)Canada (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Langley City plotted against British Columbia and Canada. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Langley City's incremental SNDi fell from 2.76 to 2.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Langley City ranked 2nd out of 8 cities in British Columbia and 20th out of 54 in Canada as of 2020.

New Street Additions (2006–2020)

SNDi value
2.18
Rank in Canada
4th of 54
Rank in British Columbia
1st of 8

Entire Network (Aggregate)

SNDi value
2.65
Rank in Canada
20th of 54
Rank in British Columbia
2nd of 8

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
Langley CityMangalagiriGyumri

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