The National Academies Press

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From page 14... ... 14  Inside shoulder width  Median width  Horizonal curve  Clear zone width  PTSU lane presence Section 2.6.2 of the draft HSM text in the PTSU Safety Evaluation Guidelines provide specific distances that represent a change in cross-sectional measurements and thus a need to begin a new segment. In practice, the start and end of speed-change lanes, horizontal curves, and PTSU lanes will form the boundaries of the majority of segments on most facilities. Read the entire page →

From page 14...

... 14  Inside shoulder width  Median width  Horizonal curve  Clear zone width  PTSU lane presence Section 2.6.2 of the draft HSM text in the PTSU Safety Evaluation Guidelines provide specific distances that represent a change in cross-sectional measurements and thus a need to begin a new segment. In practice, the start and end of speed-change lanes, horizontal curves, and PTSU lanes will form the boundaries of the majority of segments on most facilities.

Read the entire page →

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