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.