14.10.8 Access Management

DDI intersections require full access control through the interchange. A traffic simulation should be conducted to determine the impacts and any needed mitigation for adjacent and nearby intersections in the corridor. Possible disadvantages of a DDI include the following:
  • Will not allow exit ramp to entrance ramp movements;
  • Through movements along the frontage road can only be accommodated via bypass lanes or collector-distributor systems;
  • May require modifications to nearby signalized intersections;
  • Additional access control beyond the interchange may be needed to prevent weaving maneuvers;
  • May require the relocating or removal of adjacent streets/driveways to accommodate crossover and reverse curves; and
  • Removes driveway access for corner development.
Refer to the for additional guidance with respect to access management.