Hemel Hempstead in context: Street-network sprawl trends

Hemel Hempstead in context

33.64.24.85.4<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.85.4<19751976–19901991–20052006–2020SNDi of entire street network
Hemel HempsteadEngland (Region)United Kingdom (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hemel Hempstead plotted against England and United Kingdom. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Hemel Hempstead's incremental SNDi fell from 5.22 to 4.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hemel Hempstead ranked 43rd out of 124 cities in England and 50th out of 143 in United Kingdom as of 2020.

New Street Additions (2006–2020)

SNDi value
4.64
Rank in United Kingdom
98th of 143
Rank in England
88th of 124

Entire Network (Aggregate)

SNDi value
3.4
Rank in United Kingdom
50th of 143
Rank in England
43rd of 124

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
Hemel HempsteadPattaniSan Ramon de la Nueva Oran

While Pattani and San Ramón de la Nueva Orán both fluctuated in its street-construction patterns, Hemel Hempstead built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend.