Abstract
This study investigated the comprehensibility of eight safety signs for agricultural machinery. An open-ended questionnaire was provided to 36 agricultural machinery professionals, and closed-ended questionnaires to 40 native users of agricultural machinery, and 26 Vietnamese intern trainees. The percentage of participants who had never seen a certain sign varied from 56.6 % to 81.1 %, averaging 67.9 %. The percentage of professionals who responded accurately varied with the sign from 16.7 % to 91.1 %, averaging 63.9 %. Among the remaining participants, it varied from 38.6 % to 90.0 %, averaging 70.2 %. The native users comprehended the signs better than the trainees. Additional measures like training, or warning devices should be considered to effectively communicate safety messages to users.
