10.2.2 ICE Applicability

ICE does not apply to development of studies or projects that involve system optimization, which is common for post-construction finetuning of operations. However, ICE is completed under the following circumstances:
  • The intersection includes a roadway designated as a State route or as part of the National Highway System.
  • The intersection or corridor improvements present opportunity to change the type of intersection or control to improve safety and/or operations.
  • The intersection will be designed or constructed using State or Federal funding.
ICE does not need to be completed (but may be considered), under the following circumstances:
  • The proposed work does not increase the vehicular footprint (as through-put) of the intersection, such as:
    • sidewalk/streetscape improvements;
    • signal permit revision;
    • minor turn lane adjustments, such as converting a short section of shoulder to a turn lane or lengthening a turn lane; and
    • resurfacing
  • Local road intersection where the proposed condition is a right-in and right-out.
  • Where routine traffic signal timing and equipment maintenance is required, such as where the build condition is being improved with signal timing optimization.
Driveway permits:
 A District has the authority to make the determination as to when ICE needs to be performed for a driveway permit.
For corridor improvement projects with multiple intersections that are likely to need a change in control to maintain operations or improve safety, ICE is applied to each intersection, but with a view to the corridor as a system. For example, it is common to use combinations of roundabouts, R-CUT and medians that restrict turning movements in or out of minor intersections or driveways. With combinations of roundabouts, the U-turn movements that are generated by an R-CUT can be accommodated more safely, especially for slow moving vehicles affected by an R-CUT
When a corridor collection of individual ICE analyses represents a system level review, documentation is recommended in the form of a summary memo that combines results and explanation of how adjacent intersection controls are interdependent, e.g., R-CUTs combined with roundabouts for U-turns.