KAUST Eyes Sidewalk Traffic with Analytics
April 5, 2021
analysis of pedestrian data from three European cities examines how building
density and street design influence pedestrian behavior.
Pedestrian movements are tricky to track, but now the first large-scale
statistical analysis of pedestrian flow using anonymous phone data collected in
three European capital cities, London, Amsterdam and Stockholm, has been
conducted by researchers from KAUST with Swedish colleagues from Gothenburg.
Analyzing the flow of pedestrians through city streets provides insights into
how city design influences walking behavior. Studies of pedestrian flow inform
new urban developments, enable designers to define quieter areas and "urban
buzz" zones and reveal how spaces are used at different times.
“In a previous study, we found strong links between the total number of people
walking on a given street in one day and certain characteristics of the urban
environment,” says David Bolin at KAUST. Specifically, built density type, which
is a variable based on the total floor space and ground space taken up by
buildings on a street, correlated with the intensity of pedestrian flow, while
the relative position of each street in a city — its "centrality" or street type
— explained flow variations within each area.
Many similar studies have been hampered by methodological inconsistencies and
small datasets, but this one had a large dataset.
“We took advantage of the power of large-scale data collection to determine if
these same variables (density and street type) could explain both the full-day
counts in different streets and the variations in flow over the day,” says
Bolin. “We developed a functional ANOVA model to explore our results.”
Data was collected over three weeks in October 2017 from detection devices on
almost 700 street segments across 53 neighborhoods. The detectors collected
anonymous signals from mobile phones traveling at under 6 kilometers per hour to
differentiate pedestrians from people traveling on transport.
chose streets that provided a wide mix of street types and density types from
each city,” says Bolin.
Daily total pedestrian counts were influenced by built density, street type and
a street’s "attraction variables," such as the presence of local markets or
public transport stops. Built density explained the fluctuations in flow across
the day but street type did not. There were also differences between each city,
especially in the highest density built-up areas, making it difficult to
generalize the findings to other cities. The model predicted pedestrian flow for
certain parts of the three cities better than others.
“The results provide insights into the importance of street and density types in
designing areas with different qualities,” says Bolin. “Accurate predictions for
other cities would require more data from multiple cities in different seasons.”