Section 37-1-7501-04017-302 - Clear Zones For Rural Areas1. The criteria for rural facilities states that the clear zone will be determined assuming that the facility is uncurbed; i. e., the clear zone criteria presented in the Table 9-2A listed in the MDOT Roadway Design Manual will apply to all rural facilities whether curbed or uncurbed.37 Miss. Code. R. § 1-7501-04017-302