Tadjoura 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 Tadjoura plotted against Djibouti. The SNDi of new construction in Tadjoura was at its lowest in 1991-2005, while Djibouti was at its lowest in 1976-1990. Most recently, Tadjoura's incremental SNDi rose from 2.38 to 3.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tadjoura ranked 3rd out of 3 in Djibouti as of 2020.

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

What about similarly populated cities?

• Fufeng, China
• Kafr Awn, Egypt
• Kencong, Indonesia
• Sigli, Indonesia
• Solok, Indonesia
• Floridablanca, Philippines

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