Dear colleagues,

Does anyone know if there are any reference values (i.e., thresholds, service levels) for urban planning practices and analysis, considering the following indicators?

1) criminality/criminal occurrences (*)

2) accidents between vehicles and pedestrians

3) average volume of motorized traffic (in urban areas)

Are there international standards, for example, from ISO or another institution? I would appreciate it if anyone could point out a reference source (link to an article, report, or standard) to support the information.

Thank you for your attention.

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(*) For crime, I found only the Homicide Rate as a reference indicator (but without thresholds). This indicator seems to me to be extremely limiting since it ignores other types of crimes that are more common and affect more people, such as robberies (with or without weapons) and theft, in addition to neglecting sexual crimes and assaults (also grave) and vandalism (lighter). It seems that focusing only on homicides is reductionist and omits other risks to the population.

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