Ngong 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 Ngong plotted against Nord and Cameroon. The SNDi of new construction in Ngong was at its lowest in 1976-1990, compared to Nord which followed a zig-zag trend with an overall increase and Cameroon which rose steadily. Most recently, Ngong's incremental SNDi rose from 1.52 to 2.08 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ngong ranked 1st out of 5 cities in Nord and 6th out of 44 in Cameroon as of 2020.

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

What about similarly populated cities?

• Satbarwa, India
• Gazipur, Bangladesh
• San, Mali
• Goya, Argentina
• Al Amerat, Oman
• Chitrakoot, India

In new street additions, Ngong built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Satbarwa built increasingly disconnected streets from 1975 through 1991-2005, then improved and Goya fluctuated in its street-construction patterns. Looking at the full network, Satbarwa and Goya both became progressively more disconnected, while Ngong became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Ngong had a more sprawly network than Satbarwa in 1975 but the two have since reversed their relative ranking.