Risk labels are warnings that show a pictogram, colors and words as their elements that intends to transmit a risk message to all the users involved with traffic. This message is about the dangerous goods. Those risk labels are a standard and normalized in Brazil by ABNT. This study was carried through with the car drivers with the goal to evaluate the comprehensibility of the risk labels. The used methods were: focus group, interviews, production test, association between colors and words test, election test and evaluation scale test. From the obtained results it was possible to affirm that the drivers mostly chose different representations from the proposed labels already established. It was also possible to evaluate the issues related to color and words, as inappropriate for several labels.