Pemba in context: Street-network sprawl trends

Pemba in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
PembaCabo Delgado (Region)Mozambique (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Pemba plotted against Cabo Delgado and Mozambique. The SNDi of new construction in Pemba peaked in 1991-2005, compared to Cabo Delgado which peaked in 1991-2005 and Mozambique which rose steadily. Most recently, Pemba's incremental SNDi fell from 3.78 to 2.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Pemba ranked 3rd out of 5 cities in Cabo Delgado and 15th out of 44 in Mozambique as of 2020.

New Street Additions (2006–2020)

SNDi value
2.49
Rank in Mozambique
9th of 44
Rank in Cabo Delgado
2nd of 5

Entire Network (Aggregate)

SNDi value
2.4
Rank in Mozambique
15th of 44
Rank in Cabo Delgado
3rd of 5

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
PembaBorujerdAberdeen

In new street additions, Pemba and Aberdeen both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Borujerd built increasingly disconnected streets over time. For the full network, Pemba and Aberdeen both became progressively more disconnected, while Borujerd became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Pemba and Aberdeen have been converging in their street-network character since 1975.