The city council, upon appeal, is authorized to grant a variance from the requirements applicable to construction of private drives intersecting public streets when the applicant can show that by reason of particular and exceptional conditions the strict application of this chapter would result in real and unnecessary hardship, and the council through its investigation and the evidence before it is satisfied that the granting of the variance will alleviate a hardship and will not be detrimental to the public welfare and adjacent property. In granting such variance, the city council may impose such requirements upon the applicant as may be necessary under the circumstances to carry out the intent and purpose of this chapter. (Prior code § 9.063)