Davao City in context: Street-network sprawl trends

Davao City in context

3.64.55.46.37.2<19751976–19901991–20052006–2020SNDi of street additions
3.64.55.46.37.2<19751976–19901991–20052006–2020SNDi of entire street network
Davao CityDavao del Sur (Region)Philippines (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Davao City plotted against Davao del Sur and Philippines. The SNDi of new construction in Davao City peaked in 1991-2005, compared to Davao del Sur which rose steadily and Philippines which rose steadily. Most recently, Davao City's incremental SNDi fell from 5.95 to 5.67 between 1991-2005 and 2006-2020. In terms of the aggregate network, Davao City ranked 2nd out of 2 cities in Davao del Sur and 76th out of 114 in Philippines as of 2020.

New Street Additions (2006–2020)

SNDi value
5.67
Rank in Philippines
58th of 114
Rank in Davao del Sur
2nd of 2

Entire Network (Aggregate)

SNDi value
5.03
Rank in Philippines
76th of 114
Rank in Davao del Sur
2nd of 2

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

What about similarly populated cities?

2.73.64.55.46.3<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.46.3<19751976–19901991–20052006–2020SNDi of entire street network
Davao CityRaipurTiruchirappalli

While Raipur and Tiruchirappalli both built increasingly disconnected streets over time, Davao City built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Davao City and Raipur have been growing further apart in their street-network character since 1975.