1. Whenever a motor vehicle is being operated on a roadway or shoulder during the times specified in section 321.384, the driver shall use a distribution of light, or composite beam, directed high enough and of sufficient intensity to reveal persons and vehicles at a safe distance in advance of the vehicle, subject to the following requirements and limitations:

 a. Whenever a driver of a vehicle approaches an oncoming vehicle within one thousand feet, the driver shall use a distribution of light, or composite beam, so aimed that the glaring rays are not projected into the eyes of the oncoming driver. The lowermost distribution of light, or composite beam, specified in section 321.409, subsection 1, paragraph “b”, shall be deemed to avoid glare at all times, regardless of road contour and loading.
 b. Whenever the driver of a vehicle follows another vehicle within four hundred feet to the rear, except when engaged in the act of overtaking and passing, the driver shall use a distribution of light permissible under this chapter other than the uppermost distribution of light specified in section 321.409, subsection 1, paragraph “a”.

Terms Used In Iowa Code 321.415

  • Driver: means a person who operates a motor vehicle for the transportation of railroad workers in the motor vehicle on behalf of a railroad worker transportation company, whether the person is employed by the company for wages or drives for the company as an independent contractor. See Iowa Code 327F.39
  • following: when used by way of reference to a chapter or other part of a statute mean the next preceding or next following chapter or other part. See Iowa Code 4.1
  • road: include public bridges, and may be held equivalent to the words "county way" "county road" "common road" and "state road". See Iowa Code 4.1
  • Roadway: means that portion of a highway improved, designed, or ordinarily used for vehicular travel. See Iowa Code 321I.1
  • Vehicle: means any vehicle as defined in chapter 321. See Iowa Code 321H.2
 2. The provisions of subsection 1, paragraphs “a” and “b”, do not apply to motorcycles or motorized bicycles being operated between sunrise and sunset.