Umu Lawlaw in context: Street-network sprawl trends

Umu Lawlaw in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
Umu LawlawImo (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Umu Lawlaw plotted against Imo and Nigeria. The SNDi of new construction in Umu Lawlaw rose steadily, compared to Imo which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Umu Lawlaw's incremental SNDi rose from 5.11 to 6.3 between 1991-2005 and 2006-2020. In terms of the aggregate network, Umu Lawlaw ranked 3rd out of 5 cities in Imo and 277th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
6.3
Rank in Nigeria
371st of 422
Rank in Imo
5th of 5

Entire Network (Aggregate)

SNDi value
3.72
Rank in Nigeria
277th of 422
Rank in Imo
3rd of 5

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
Umu LawlawVasterasPingquan

In new street additions, Umu Lawlaw built increasingly disconnected streets over time, while Västerås fluctuated in its street-construction patterns and Pingquan built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Umu Lawlaw and Västerås both became progressively more disconnected, while Pingquan grew more disconnected from 1975 through 1991-2005, then improved. Umu Lawlaw and Västerås have been growing further apart in their street-network character since 1975.