Skip to main content
. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Occup Environ Hyg. 2011 Nov;8(11):662–672. doi: 10.1080/15459624.2011.617234

TABLE I.

Summary of Real-Time PM2.5 Concentrations Measured by DustTrak for the Subset of Truck Routes with Matching GPS (n=21)

Cities Truck
RoutesA 		Number of
measurements
 % On-Road On-Road
Mean
Conc.
of PM2.5
(µg/m3)		 Cities Truck
Routes		 Number of
Measurements
 % On-Road On-Road
Mean
Conc. of
PM2.5
(µg/m3)
On-Road Total On-Road Total
Columbus,
Ohio		 3 184 798 23.1 31.6 Portland,
Ore.		 1B 383 980 39.1 23.3
6 181 841 21.5 43.6 2 472 1455 32.4 17.0
Milwaukee,
Wisc.		 2 412 1344 30.7 10.3 4 288 1102 26.1 25.4
3 155 861 18.0 18.3 5 304 1251 24.3 25.2
6 464 1534 30.2 27.5 6B,C 320 1182 27.1 62.3
Phoenix,
Ariz.		 1 344 1396 24.6 27.9 Denver,
Colo.		 1 326 1501 21.7 50.8
2 280 1290 21.7 59.9 2 251 1139 22.0 51.3
3 408 1021 40.0 17.3 3 197 1415 13.9 17.9
4 637 1471 43.3 11.6 4 246 993 24.8 26.1
5 304 1170 26.0 57.3 6B 203 591 34.4 24.8
6B,C 382 1240 30.8 19.6
A

Truck route numbers correspond to those in Figure 3.

B

Routes with high particulate exposure peaks.

C

Truck driver smoked.