Iowa Code 321.409 – Mandatory lighting equipment
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1. Except as otherwise provided in this chapter, the headlamps or the auxiliary driving lamp or the auxiliary passing lamp or combination thereof on motor vehicles other than motorcycles or motorized bicycles shall be so arranged that the driver may select at will between distributions of light projected to different elevations and the lamps may, in addition, be so arranged that selection can be made automatically, subject to the following limitations:
a. There shall be an uppermost distribution of light, or composite beam, so aimed and of sufficient intensity to reveal persons and vehicles at a distance of at least three hundred fifty feet ahead for all conditions.
b. There shall be a lowermost distribution of light, or composite beam so aimed and of sufficient intensity to reveal persons and vehicles at a distance of at least one hundred feet ahead. On a straight level road under any condition of loading none of the high-intensity portion of the beam shall be directed to strike the eyes of an approaching driver.
Terms Used In Iowa Code 321.409
- Condition: means a general problem that may be attributable to a defect in more than one part. See Iowa Code 322G.2
- 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
- Vehicle: means any vehicle as defined in chapter 321. See Iowa Code 321H.2
2. Every new motor vehicle, other than a motorcycle or motorized bicycle which has multiple-beam road-lighting equipment shall be equipped with a beam indicator, which shall be lighted whenever the uppermost distribution of light from the headlamps is in use, and shall not otherwise be lighted. The indicator shall be so designed and located that when lighted it will be readily visible without glare to the driver of the vehicle.