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Actual Ramp Length Definition Clarification

Soheil Sajjadi
Arcadis
Actual Ramp Length Definition Clarification was posted on June 29th, 2018 at 4:33 PM EDT
regarding Chapter 14: Freeway Merge and Diverge Segments

Page 14-18 - Paragraph 2: does the actual distance equal the ramp length? “….If the actual distance is larger than Leq, Equation 14-4 or Equation 14-5 should be used as appropriate….”

Scott Washburn
University of Florida
RE: Actual Ramp Length Definition Clarification was posted on June 29th, 2018 at 4:59 PM EDT

It is the distance between the adjacent ramps.

Soheil Sajjadi
Arcadis
RE: Actual Ramp Length Definition Clarification was posted on June 29th, 2018 at 5:49 PM EDT

Many thanks Scott for all your help. They are all helpful.

For this question, In any situation that I envision the ramp arrangements, "the actual ramp length" would equal the current segment (merge/diverge) length? Maybe, I could have explained it better if I could use some visualization.

Scott Washburn
University of Florida
RE: Actual Ramp Length Definition Clarification was posted on June 30th, 2018 at 11:13 AM EDT

Soheil, you are welcome.

I may not be completely clear on your question, but if you are still asking about how the distance between ramps is measured, it is measured from gore to gore. The "length of the ramp" would usually be interpreted as the length of the ramp roadway between the two roadways it connects. That measurement is not considered in the Leq calculations.

Soheil Sajjadi
Arcadis
RE: Actual Ramp Length Definition Clarification was posted on July 5th, 2018 at 1:38 PM EDT

Thank you Scott, It clarifies it.

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