Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated) (2010) / Chapter Skim
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Post-Mounted Delineators
Post-Mounted Delineators
Pages 58-59
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Design Guidelines Spacing: Drivers respond similarly to fixed and variable spacing of delineators when perceiving curvature. Thus, either spacing method can be used for outlining the curve approach and departure segments.
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From page 59... ...
For this reason, curve warnings and delineation treatments that highlight the sharpness of the curve ahead or increase a drivers' momentary sense of their apparent speed appear to offer promise in allowing drivers to enter curves at a lower speed. Delineation treatments may also assist drivers with selecting and maintaining appropriate lane position while travelling throughout the curve.
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