maximum relative gradient (MRG)
ƒ1- 1.
The maximum allowable grade difference between the
grade point (or center line) and the outside edge
of travelway (EOT), used in the minimum length of
runoff computation. ƒ3
2. The maximum
acceptable difference between the longitudinal grades
of the axis of rotation and the edge of pavement.
See ASSHTO 2004, pg. 177 for the minimum length of
runoff formula using the MRG.
median ƒ1-
1.
The effective width for a divided facility on a cross
sections and typical sections between the edge of
travel (EOT).[image]
2.
ƒ3 The
portion of a divided highway separating the traveled
way for traffic in opposing directions.[image][image]
NC DOT
NC DOH
NC GOV
