Daugavpils in context: Street-network sprawl trends

Daugavpils in context

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
DaugavpilsLatgale (Region)Latvia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Daugavpils plotted against Latgale and Latvia. The SNDi of new construction in Daugavpils fell steadily, compared to Latgale which followed a zig-zag trend with an overall increase and Latvia which rose steadily. Most recently, Daugavpils's incremental SNDi fell from 1.61 to 1.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Daugavpils ranked 1st out of 1 cities in Latgale and 2nd out of 2 in Latvia as of 2020.

New Street Additions (2006–2020)

SNDi value
1.54
Rank in Latvia
1st of 2
Rank in Latgale
1st of 1

Entire Network (Aggregate)

SNDi value
2.03
Rank in Latvia
2nd of 2
Rank in Latgale
1st of 1

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

What about similarly populated cities?

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
DaugavpilsYangyuanArras

In new street additions, Daugavpils built increasingly connected streets over time, while Yangyuan built increasingly disconnected streets from 1975 through 1976-1990, then improved and Arras built increasingly disconnected streets over time. For the full network, Daugavpils became progressively more connected, while Yangyuan grew more disconnected from 1975 through 1991-2005, then improved and Arras became progressively more disconnected. Notably, Daugavpils had a more sprawly network than Yangyuan in 1975 but the two have since reversed their relative ranking.