I was traveling on I-85 north. The traffic slowed and as I started braking for the traffic in front of me and a tractor-trailer behind me rear-ended me with strong impact. Passing drivers called 911 and I remained in my car until the officers arrived. I refused any medical attention at the scene of the accident. When the officers arrived, I exchange all necessary information. Even though the officer obtained information from both of us, I collected the other driver's license and insurance information on my own as well. This is important just in case the officer forgets to include any important information on the accident report. Don't always rely on the police to gather the information for you. I also took pictures of both my vehicle and the other drivers' truck at the scene of the accident.