Iowa Code Title VIII. Transportation [Chs. 306-330B] § 321.341. Obedience to signal indicating approach of railroad train or railroad track equipment

1. When a person driving a vehicle approaches a railroad grade crossing and warning is given by automatic signal, crossing gates, a flag person, or otherwise of the immediate approach of a railroad train or railroad track equipment, the driver of the vehicle shall stop the vehicle within fifty feet but not less than fifteen feet from the nearest rail and shall not proceed until the driver can do so safely.

2. The driver of a vehicle shall stop the vehicle and the vehicle shall remain standing and not traverse such a grade crossing when a crossing gate is lowered or when a human flagman gives or continues to give a signal of the approach or passage of a railroad train or railroad track equipment.