The state statute regarding when motorist must have their headlamps on has been amended. The old law required them just during hours of darkness. The new law also mandates their use during a period of limited visibility.

NOTE: OFFICERS WILL BE ISSUING WARNINGS IN LIEU OF CITATIONS FOR THE FIRST SIX MONTHS OF THIS AMENDED LAW. The text of the new law is included below:

LIGHTING EQUIPMENT

347.06 347.06 When lighted lamps required.
347.06(1) (1) Except as provided in subs. (2) and (4), no person may operate a vehicle upon a highway during hours of darkness or during a period of limited visibility unless all headlamps, tail lamps, and clearance lamps with which the vehicle is required to be equipped are lighted. Parking lamps as described in s. 347.27 may not be used for this purpose. This subsection does not apply if lamps that are automatically activated whenever the vehicle is started are in use, if the headlamps are of sufficient intensity to satisfy the requirements for daytime running lamps under 49 CFR 571.108, S5.5.11 (a).
340.01 (43d) "Period of limited visibility" means any time that weather conditions limit visibility such that objects on a highway are not clearly discernible at 500 feet from the front of a vehicle.
165,3