Rancagua 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 Rancagua plotted against Libertador General Bernardo O'Hi and Chile. The SNDi of new construction in Rancagua was at its lowest in 1976-1990, compared to Libertador General Bernardo O'Hi which rose steadily and Chile which followed a zig-zag trend with an overall increase. Most recently, Rancagua's incremental SNDi rose from 3.54 to 4.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Rancagua ranked 2nd out of 2 cities in Libertador General Bernardo O'Hi and 28th out of 38 in Chile as of 2020.

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

What about similarly populated cities?

• Southend-on-Sea, United Kingdom
• Caserta, Italy
• Khalilabad, India
• Vehari, Pakistan
• Anlu, China
• Fuji, Japan

In new street additions, Rancagua built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Southend-on-Sea built increasingly disconnected streets from 1975 through 1976-1990, then improved and Vehari built increasingly disconnected streets over time. Looking at the full network, Southend-on-Sea and Vehari both became progressively more disconnected, while Rancagua became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Rancagua and Southend-on-Sea have been converging in their street-network character since 1975.