Why do truckers turn on their white lights in the back? We were going uphill toward an interstate and this trucker in front of me started to shine his rear lights at me. Never seen it before while moving so I thought it was kind of odd. When we got to the interstate, he was braking and shining his lights a lot. I mean it's not like I was right at his tail. I got kind of piss cuz he was flashing his brake lights on me so I flash my high beam back at him and droved hard pass him. Anyway I thought this guy was stupid.