County

Mean Daily Trip Count (# vehicle trips)

Elasticities

Daily Cost of Trip Count Decrease ($)

March-April 2019

March-April 2020

% Reduction

PM2.5

Nox

Low Cost

High Cost

Davis

58,906

48,768

17.2

2.38

2.70

42,580

93,777

Salt Lake

127,488

93,351

26.8

1.53

1.74

143,375

315,767

Utah

84,510

62,122

26.5

1.55

1.76

94,030

207,089

Weber

51,817

39,779

23.2

1.76

2.00

50,560

111,352

Wasatch Front

322,721

244,020

24.4

1.68

1.91

330,544

727,984