Pohon Sirih in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Pohon Sirih plotted against Nusa Tenggara Timur and Indonesia. The SNDi of new construction in Pohon Sirih peaked in 1991-2005, compared to Nusa Tenggara Timur which rose steadily and Indonesia which rose steadily. Most recently, Pohon Sirih's incremental SNDi fell from 6.52 to 5.12 between 1991-2005 and 2006-2020. In terms of the aggregate network, Pohon Sirih ranked 11th out of 12 cities in Nusa Tenggara Timur and 207th out of 366 in Indonesia as of 2020.

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

What about similarly populated cities?

• Janjgir, India
• Agnibilékrou, Côte d'Ivoire
• Simpang Ampat, Malaysia
• Yawal, India
• Lauiyah Nandangarh, India
• Adirampattinam, India

In new street additions, Pohon Sirih built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Janjgir fluctuated in its street-construction patterns and Yawal fluctuated in its street-construction patterns. For the full network, Pohon Sirih became progressively more disconnected, while Janjgir fluctuated in connectivity and Yawal became progressively more disconnected. Pohon Sirih and Yawal have been converging in their street-network character since 1975.