Um Dukhan in context: Street-network sprawl trends

Um Dukhan in context

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
Um DukhanSila (Region)Chad (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Um Dukhan plotted against Sila and Chad. The SNDi of new construction in Um Dukhan followed a zig-zag trend, compared to Sila which peaked in 1976-1990 and Chad which rose steadily. Most recently, Um Dukhan's incremental SNDi rose from 2.76 to 8.31 between 1991-2005 and 2006-2020. In terms of the aggregate network, Um Dukhan ranked 2nd out of 2 cities in Sila and 30th out of 31 in Chad as of 2020.

New Street Additions (2006–2020)

SNDi value
8.31
Rank in Chad
30th of 31
Rank in Sila
2nd of 2

Entire Network (Aggregate)

SNDi value
7.6
Rank in Chad
30th of 31
Rank in Sila
2nd of 2

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
Um DukhanLido di OstiaMamou

In new street additions, Um Dukhan fluctuated in its street-construction patterns, while Lido di Ostia built increasingly disconnected streets from 1975 through 1976-1990, then improved and Mamou built increasingly disconnected streets over time. For the full network, Um Dukhan fluctuated in connectivity, while Lido di Ostia grew more disconnected from 1975 through 1991-2005, then improved and Mamou became progressively more disconnected. Um Dukhan and Mamou have been converging in their street-network character since 1975.