Selecting Ramp Design Speeds, Volume 1: Guide
Selection of
a design speed should be based upon the anticipated operating speed, topography, adjacent land
use, modal mix, and functional classification of the roadway.
The TRB National Cooperative Highway Research Program's
NCHRP Web-Only Document 313: Selecting Ramp Design Speeds, Volume 1: Guide
provides further detail for selecting an appropriate ramp
design speed than presented in the 2018
Green Book, to address several overarching challenges
that may lead to confusion or inconsistent interpretation of existing AASHTO guidance for
selecting an appropriate ramp design speed.
Supplemental to the document are
NCHRP Web-Only Document 313: Selecting Ramp Design Speeds,Volume 2: Conduct of Research Report
and Ramp Speed Profile Model
worksheets.
This Summary Last Modified On: 11/23/2021