49 CFR 234.217 : Transportation (§ 1.1 To Parts 1581-1699) — (§ 200.1 To Parts 273-299) — Other Regulations Relating To Transportation (Continued) (§ 200.1 To Parts 273-299) — Federal Railroad Administration, Department Of Transportation (§ 200.1 To Parts 273-299) — Grade Crossing Safety (§ 234.1 To Appendix B To Part 234) — Maintenance, Inspection, And Testing (§ 234.201 To § 234.275) — Maintenance Standards (§ 234.201 To § 234.245) — Flashing light units.

4 Aug 2016

(a) Each flashing light unit shall be properly positioned and aligned and shall be visible to a highway user approaching the crossing.

(b) Each flashing light unit shall be maintained to prevent dust and moisture from entering the interior of the unit. Roundels and reflectors shall be clean and in good condition.

(c) All light units shall flash alternately. The number of flashes per minute for each light unit shall be 35 minimum and 65 maximum.

49 CFR 234.217