Liège in context: Street-network sprawl trends

Liege in context

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
LiegeWallonie (Region)Belgium (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Liège plotted against Wallonie and Belgium. The SNDi of new construction in Liège peaked in 1991-2005, compared to Wallonie which rose steadily and Belgium which rose steadily. Most recently, Liège's incremental SNDi fell from 3.7 to 3.65 between 1991-2005 and 2006-2020. In terms of the aggregate network, Liège ranked 4th out of 6 cities in Wallonie and 12th out of 16 in Belgium as of 2020.

New Street Additions (2006–2020)

SNDi value
3.65
Rank in Belgium
9th of 16
Rank in Wallonie
3rd of 6

Entire Network (Aggregate)

SNDi value
2.37
Rank in Belgium
12th of 16
Rank in Wallonie
4th of 6

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
LiegeKhansahibWonsan

In new street additions, Liège built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Khansahib built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Wonsan built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Liège became progressively more disconnected, while Khansahib became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Wonsan grew more disconnected from 1975 through 1991-2005, then improved.