Hi, Jenny -
On the page for starting a new thread, there's a dropdown menu of thread tags that you can select from. But if you do it wrong, don't worry. We moderators will fix it and not mind a bit.

There are many California highways, especially busy two-lane highways that are designated "daylight safety sections," and drivers are required to have their headlights on round-the-clock in those sections. I was told by a police office that headlights are not required in such areas if the care has running lights in front. I have not been able to find that in writing, however. California also has a fairly new law that requires drivers to have their headlights on whenever they have their windshield wipers on.

My understanding is that studies have shown that cars are far more visible with their headlights on, even during daylight hours, so manufacturers have been encouraged to have some sort of daytime running lights.

-Joe Offer-
retired federal investigator
Applegate, Placer County, California