Oyem 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 Oyem plotted against Wouleu-Ntem and Gabon. The SNDi of new construction in Oyem peaked in 1991-2005, compared to Wouleu-Ntem which followed a zig-zag trend with an overall increase and Gabon which peaked in 1976-1990. Most recently, Oyem's incremental SNDi fell from 11.01 to 9.12 between 1991-2005 and 2006-2020. In terms of the aggregate network, Oyem ranked 1st out of 1 cities in Wouleu-Ntem and 3rd out of 5 in Gabon as of 2020.

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

What about similarly populated cities?

• Panskura, India
• Gossaigaon, India
• Le'an, China
• Krishnarajanagara, India
• Jamasa, Egypt
• Hala, Pakistan

In new street additions, Oyem built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Panskura built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Krishnarajanagara built increasingly disconnected streets over time. For the full network, Oyem became progressively more disconnected, while Panskura became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Krishnarajanagara grew more disconnected from 1975 through 1991-2005, then improved. Notably, Oyem had a more connected network than Panskura in 1975 but the two have since reversed their relative ranking.