Vehicular driveway connections between any use on a lot in the B-1 Zone and an abutting nonresidential district are encouraged and may be permitted by the Planning Board upon its determination that the same may be made without danger to the health and general welfare of the surrounding properties and with due consideration of such factors as congestion in the street, fire, panic, adequate light and air, overcrowding of property or buildings, undue concentration of population and conservation of value of property.