Vĩnh Yên in context: Street-network sprawl trends

Vinh Yen in context

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
Vinh YenVinh Phuc (Region)Vietnam (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Vĩnh Yên plotted against Vĩnh Phúc and Vietnam. The SNDi of new construction in Vĩnh Yên fell steadily, compared to Vĩnh Phúc which was at its lowest in 1976-1990 and Vietnam which rose steadily. Most recently, Vĩnh Yên's incremental SNDi fell from 3.26 to 2.89 between 1991-2005 and 2006-2020. In terms of the aggregate network, Vĩnh Yên ranked 1st out of 3 cities in Vĩnh Phúc and 19th out of 126 in Vietnam as of 2020.

New Street Additions (2006–2020)

SNDi value
2.89
Rank in Vietnam
12th of 126
Rank in Vĩnh Phúc
1st of 3

Entire Network (Aggregate)

SNDi value
3.23
Rank in Vietnam
19th of 126
Rank in Vĩnh Phúc
1st of 3

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
Vinh YenLongshanZhaoxian

In new street additions, Vĩnh Yên built increasingly connected streets over time, while Longshan built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Zhaoxian built increasingly disconnected streets over time. For the full network, Vĩnh Yên became progressively more connected, while Longshan became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Zhaoxian became progressively more disconnected. Vĩnh Yên and Longshan have been growing further apart in their street-network character since 1975.