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Table 2 Distribution of UFPM particle number concentration (in number of particles/cm3) by route type (n = 32)

From: Respiratory outcomes of ultrafine particulate matter (UFPM) as a surrogate measure of near-roadway exposures among bicyclists

Road type

Mean ± SD

Median

Range (Min-Max)

High traffic routes

49,369 ± 11,812

44,023

36,049–98,420

Low traffic routes

17,474 ± 6,600

16,553

7,694–25,924