Your questionaaire opens with the following bold statement: "Bicycle/motor vehicle accidents are occurring more and more in urbanized locations from the lack of visibility between both cyclists and drivers."
Is this an assumption on your part or have you researched it and can provide evidence to back it up?
Also, why are you focusing on making the cyclist more visible as opposed to looking at how to make drivers more observant?
Your question - "At what times do you feel unsafe ..." doesn't have a None option; so I can't answer as I don't feel unsafe when cycling. I occasionally encounter unsafe driving from people who should be paying more attention (or who deliberately try to intimidate me because I'm on a bicycle), but I don't feel unsafe because of my mode of transport.
I appreciate you've got to pick something for your project, and have completed the questionnaire to assist, but it bugs me that lots of engineering students try to solve the 'cyclist problem' rather than looking at what they can do to make the roads safer for cyclists (which isn't the same thing!). 😉