Pulka 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 Pulka plotted against Borno and Nigeria. The SNDi of new construction in Pulka was at its lowest in 1976-1990, compared to Borno which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Pulka's incremental SNDi rose from 1.11 to 2.56 between 1991-2005 and 2006-2020. In terms of the aggregate network, Pulka ranked 6th out of 16 cities in Borno and 38th out of 422 in Nigeria as of 2020.

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

What about similarly populated cities?

• Champa, India
• Isa, Nigeria
• Bengkalis, Indonesia
• Sukoharjo, Indonesia
• Julābditola, India
• Rajauli, India

In new street additions, Pulka built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Champa built increasingly disconnected streets over time and Sukoharjo fluctuated in its street-construction patterns. Looking at the full network, Champa and Sukoharjo both became progressively more disconnected, while Pulka became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Pulka had a more sprawly network than Champa in 1975 but the two have since reversed their relative ranking.