You need an email address to participate. We will ask you a few questions regarding your cycling experience and then you will be able to start watching and rating videos. You can stop at any time you wish. The ratings you and other cyclists provide are averaged for each street; and once you are done rating, we will show you the cycling safety map for D.C with the ratings collected so far. With your help, we will be able to create safety maps like the one shown below, and to understand what are the factors that make certain streets safer. The more videos you rate, the more you'll be helping cycling safety and science!