1) A difficulty for your project is that individuals may have difficulties performing such tests that would not necessarily represent a cognitive impairment. For example, I’m farsighted.  If I’m not wearing my reading glasses I would have no impairments when driving, but might have difficulty seen fine details on an IPad.  Similarly, many elderly people are identified as having cognitive problems when it is just that they are hearing-impaired.


Yes, this is a valid point. The CAT tool would be able to be customized. People with disabilities could submit a personalized test result. If you have eye sight limitation, you report that on your license. Sort of the same thing. This would allow for a fair comparison of test results. All individuals with cognitive disabilities that do not hinder their driving skills would benefit from this tool. It allows us to judge someone on their own prior capabilities


2) Even though it may be possible that some people can be under the influence of cannabis and be adequate drivers, on average it impairs driving ability. Perhaps not to the same extent as alcohol, but still something to be worried about in terms of law-making.


Correct. Accute Cannabis Intoxication does present a low to moderate increase to traffic accidents. This is one reason a determination tool would be useful. The CAT tool is not designed to allow cannabis users to drive. it allows us to determine the persons abilities. Intrinsicly it would protect a subset of cannabis users, people with cognitive or mental disabilities or in the very least, provide us with valuable information to support whatever claims the data reflects. The studies on ACI and motor vehicle accidents does not represent the subset of users that are not impaired. The data this tool would produce could allow for a more detailed study to be preformed on the subject.