Abstract
From the studies conducted over the years on car crashes specially single vehicle crashes, it is generally concluded that driver fatigue has been one of the major causes of the accident. One of the contributing factors in driver's fatigue could be attributed to the presence of high levels of carbon dioxide in the vehicle The aim of this project was to test and record the levels of carbon dioxide experienced inside a modern family car, in order to establish whether the concentration present was comparable to those suggested in the literature and standards for the comfort level.