Human Factors Guidelines for Road Systems, Collection B: Chapters 6, 22 (Tutorial 3), and 23 (Updated) (2009) / Chapter Skim
Currently Skimming:
Speed Selection on Horizontal Curves
Speed Selection on Horizontal Curves
Pages 6-7
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 6... ...
urban environment, and terrain type; state DOTs typically consider factors such as functional classification, legal speed limit (as well as legal speed limit plus an adjustment value of 5 or 10 mi/h) , anticipated volume, terrain type, development, costs, and design consistency.
|
From page 7... ...
stated factors contributing to higher crash frequency on horizontal curves include higher traffic volumes, sharper curvature, greater central angle, lack of a transition curve, a narrower roadway, more hazardous roadway conditions, less stopping distance, steep grade on curve, long distance since last curve, lower pavement friction, and lack of proper signs and delineation. Cross References The Influence of Perceptual Factors on Curve Driving, 6-4 Key References 1.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.