*clears throat, attempts mom voice* Go ride in the South Broadway protected bike lane, adults in other cities are getting hurt in their streets!

In fact, the deaths of two cyclists in San Francisco are part of the reason that anonymous bike activists are placing cones along painted bike lanes in their city, reports Fast Co.Exist.

Orange cones are “really a great prototyping tool” an activist told the outlet. “They put something on the ground that’s visible. Cars really slow down around orange cones — it’s really a remarkable feat of psychology.”

Meanwhile, cyclists in Denver have three months of a parking-protected bike lane to try out along South Broadway.