A two-lane highway (two 12-ft lanes) has a posted speed limit of 50 mi/h and, on one section, has both horizontal and vertical curves, as shown in Fig. 3.15. A recent daytime crash (driver traveling eastbound and striking a stationary roadway object) resulted in a fatality and a lawsuit alleging that the 50-mi/h posted speed limit is an unsafe speed for the curves in question and was a major cause of the crash. Evaluate and comment on the roadway design. Plan view (horizontal alignment) PC Station 16+00 Profile view (vertical alignment) e=8.0% Sight obstruction 18 ft A = 80° PT Station 32+ 75 G₂=+4.0% G₁=-2.0% PVC Station 14+00 PVT Station 18+80 PVI Station 16+40 Figure 3.15 Horizontal and vertical alignment for Example 3.17.