Problem: You have considerable freedom in choosing a topic, with the exception of the topic must apply directly to transportation.
The requirement is that your topic requires academic research not business research and that you submit both your paper topic (which should not contain a question) and a full paragraph statement, that statement must contain a research question to be answered or a hypothesis to be tested. Most "why" questions focus more on workplace related issues and business not academic or scholarly research so they seldom are acceptable questions for scholarly research