Unzoned industrial areas.
Unzoned industrial areas. An area where there is no zoning in effect and which is used primarily for industrial purposes as determined by the State and approved by the FHWA. An unzoned area cannot include areas which may have a rural zoning classification or land uses established by zoning variances or special exceptions.
Source
23 CFR § 751.7
Scoping language
For purposes of this part, the following definitions shall apply: