Analysis Periods

Variable

Mean

Standard deviation

Minimum

Maximum

All months

Crash count

1.544

1.899

0

11

CMH

11.714

11.819

1.026

76.508

QMH

1.332

2.576

0

16.538

AADT

28,677

6740

1670

42,700

TTI

1.005

0.021

0.979

1.189

Speed deficit

−0.043

1.425

−1.966

11.034

Work zone months only

Crash count

0.6542

1.1720

0

11

CMH

4.349

7.0149

0.0107

50.499

QMH

1.295

2.241

0.0105

16.134

AADT

28,815

6514

14,600

42,700

TTI

1.005

0.0316

0.9743

1.208

Speed deficit

−0.146

1.764

−1.966

11.034

Non-work zone months only

Crash count

0.879

1.384

0

10

CMH

7.279

7.254

0.602

55.793

QMH

1.159

2.713

0.008

16.134

AADT

28,815

6514

14,600

42,700

TTI

1.006

0.0169

0.989

1.185

Speed deficit

0.060

0.969

−1.204

10.232