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The National Academies

NCHRP 20-07/Task 398 [Active]

Development of Performance-Based Geometric Design Content for the Next Edition of the AASHTO Green Book
[ NCHRP 20-07 (Research for AASHTO Standing Committee on Highways) ]

  Project Data
Funds: $200,000
$100,000 from NCHRP 20-07, $100,000 from NCHRP 20-24
Staff Responsibility: B. Ray Derr

The objective of this project is to fulfill the intent of the AASHTO Standing Committee on Highway's resolution "Direction on Flexibility in Design Standards." $100,000 in 20-07 funds were obligated along with $100,000 in 20-24 funds. The work has been divided in subtasks.

  • Task 398A. $20,000 was added to the NCHRP 20-07/Task 394 contract to increase the focus on flexibility in Chapter 1 of the 2018 edition of the Green Book.
  • Task 398B. $100,000 was contracted to MRIGlobal to do the technical editing for the 2018 edition of the Green Book.
  • Task 398C. $30,000 to fund an additional meeting of the AASHTO Technical Committee on Geometric Design so that they could meet the development schedule for the 2018 Green Book and fulfill the intent of the resolution (complete).
  • Task 398D. $50,000 in reserve, likely to be used for educational materials for executives and practitioners.

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