Idar 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 Idar plotted against Gujarat and India. The SNDi of new construction in Idar peaked in 1976-1990, compared to Gujarat which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Idar's incremental SNDi fell from 2.57 to 1.84 between 1991-2005 and 2006-2020. In terms of the aggregate network, Idar ranked 12th out of 92 cities in Gujarat and 224th out of 1868 in India as of 2020.

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

What about similarly populated cities?

• Ann Arbor, United States
• St. John's, Canada
• Ilhéus, Brazil
• Bukama, Democratic Republic of the Congo
• Novotroitsk, Russia
• Takum, Nigeria

In new street additions, Idar built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Ann Arbor fluctuated in its street-construction patterns and Bukama built increasingly disconnected streets over time. Looking at the full network, Ann Arbor and Bukama both became progressively more disconnected, while Idar grew more disconnected from 1975 through 1991-2005, then improved. Idar and Ann Arbor have been converging in their street-network character since 1975.