Trenton 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 Trenton plotted against New Jersey and United States. The SNDi of new construction in Trenton rose steadily, compared to New Jersey which followed a zig-zag trend with an overall increase and United States which peaked in 1991-2005. Most recently, Trenton's incremental SNDi rose from 3.77 to 3.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Trenton ranked 1st out of 5 cities in New Jersey and 41st out of 333 in United States as of 2020.

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

What about similarly populated cities?

• Trenggalek, Indonesia
• Bharatpur, Nepal
• Purwodadi, Indonesia
• Dolatabad, Iran
• Ambo, Ethiopia
• Sheyang, China

In new street additions, Trenton and Trenggalek both built increasingly disconnected streets over time, while Dolatabad built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Trenton and Trenggalek both became progressively more disconnected, while Dolatabad became progressively more connected. Trenton and Trenggalek have been growing further apart in their street-network character since 1975.