14.10.10 Operations

DDI operations may vary slightly based on location and traffic demand. There are three potential phasing schemes:
  • Two-critical movement phasing;
  • Three-critical movement phasing; and
  • Four critical movement phasing.
Signal timing and phasing of the adjacent intersections must be coordinated to provide appropriate capacity to the DDI. Refer to the
NCHRP Report 959
for more information on operations.