Notes for Figure 6H-41—Typical Application 4Median Crossover for an Exit Ramp

 

Guidance:

 

  1.   This typical application should be used for carrying an  exit ramp across a closed directional roadway of a divided highway. The design criteria contained in the AASHTO “Policy on the Geometric Design of Highways and Streets” (see Section 1A.11) should be used for determining the curved alignment.
  2.   The guide signs should indicate that the ramp is open, and where the temporary ramp is located. Conversely, if the ramp is closed, guide signs should indicate that the  ramp is closed.
  3.   When the exit is closed, a black on orange EXIT CLOSED sign panel should be placed diagonally across the interchange/intersection guide signs and channelizing devices should be placed to physically close the ramp.
  4.   In the situation (not shown) where channelizing devices are placed along the mainline roadway, the devices’ spacing should be reduced in the vicinity of the off ramp to emphasize the opening at the ramp itself. Channelizing devices and/or temporary pavement markings should be placed on both sides of the temporary ramp where it crosses the median and the closed roadway.
  5.   Advance guide signs providing information related to the temporary exit should be relocated or duplicated adjacent to the temporary roadway.

 

Standard:

 

    6. A temporary EXIT sign shall be located in the temporary gore. For better visibility, it shall bmounted a minimum of 7 feet from the pavement surface to the bottom of the sign.

 

Option:

 

  1.   Guide signs referring to the exit may need to be relocated to the median.
  2.    The temporary EXIT sign placed in the temporary gore may be either black on orange or white on green.
  3.   In some instances, a temporary deceleration lane may be useful in facilitating the exiting maneuver.
  4.   When a temporary traffic barrier is used to separate opposing vehicular traffic, the Two-Way Traffic signs may be omitted.