1) Yes, both would also be an option.

2) Nothing is wrong with a mirror, but we are interested in other options as well

Fair enough, my apologies for being too brief. For traffic safety research purposes we are looking to develop two experiments. I will outline them shortly. 1. In order to investigate the depth to which bicyclists use sound to navigate their surroundings we have developed an instrumented bicycle to m...

Hi, For a project I want to measure distance between the raspberry pi and other objects over two ranges. The first range is 0-25m, the second range is 15-100m. I have not found a sensor (or combination of sensors) capable of doing this yet. Is anyone aware of the existence of such a sensor? Any help...

Thank you so much for taking the time to respond to my question. You have given some very useful ideas. I'm going to build a few different set-ups and try them for accuracy. Will let you know how it goes in a few weeks!

Kind regards,
Paul

Hello, I am a researcher based in the Netherlands working in the field of traffic safety. We are currently planning a research project into the effects of fatigue, stress and a couple of other factors on group dynamics within a group of racing cyclists. In order to gather the data we need, we have t...