CE. Refers to a categorical exclusion, which is an action with no individual or cumulative significant environmental effect pursuant to 40 CFR 1508.4 and 771.116, 771.117, or 771.118 of this chapter; unusual circumstances are taken into account in making categorical exclusion determinations.
23 CFR § 774.17
The definitions contained in 23 U.S.C. 101 are applicable to this part. In addition, the following definitions apply: