Quote Originally Posted by froshie1 View Post
CA's traffic rules are very strict and most people are disciplined drivers. Maybe the reason why they do that is to add more visibility.
+1 That's exacly the reason why it's required by law. Just because your vision allows you to see others does not mean that other people's vision allows them to see you. That's also why most cars here have their lights on by dusk, it allows better visibilty for other cars to see your vehicle. Keep in mind that headlights serve two functions, it lets you see when it's dark or low visibility and it lets others see you also.