Page 70 - Design Considerations Based on Quantitative Risk Assessments for Slopes

Case Studies

Federal Route FT185

▪ Probability of reaching the element at risk, i.e., the vehicle, for each up-

slope is estimated based on estimated travel distance while the

probability for down-slope is assumed as 1.0.

95% 5%
Travel distance estimates with their

confidence level for cut slopes based
Cut or Up-Slope
on height and slope angle could be
Slope Height interpolated to obtain an objective

estimate of probability of reaching the
element at risk, P
TL
Slope Angle

Fill or Down-Slope
2m 6m 2m