Relationship between truck driver fatigue and rear-end collision risk
Fig 2
Relationship between collision risk and LF deviation score or LF/HF ratio.
Correlation between the shift-day collision risk judgment frequency (daily collision risk index) R1hr and (A) shift-day pre-shift LF deviation score, (B) LF/HF ratio. Correlation between R1hr and (C) LF deviation score of post-shift condition for the day prior to shift-day, (D) LF/HF ratio. Pearson’s correlation coefficient and the p-value are as indicated.