The most important strategy to modify high risk behavior, to prevent traffic accident and decrease death is effective education. It is necessary to have systematic steps with scientific background to educate effectively. The health educator has essential role in every education program; therefore the first question to ask is who should educate? The next in an education for reduce traffic accident is whom should receive education? The educational needs of diverse groups due to their roles, individual and environmental issues are different. Therefore, it is necessary in successful education program to have concrete audience profile. These information assist to develop messages and content for different audiences. Because of dissimilar interests, accesses, limitations, before each education program we should define appropriate instructional methods and media. The time of education also is important, so we should ask what time is effective. Which place is better for education?  How much time should allocate to educate? How long it should be repeated? Do this education program present effectively? In this lecture, we will provide the answer to these eight questions.