The red and orange triangle is an international symbol for slow moving vehicles.
So, my reflective red tape here enhances safety in a couple of ways. Not only does it enhance visibility directly, but it engages that subconcious part of drivers which recognize this symbol and relate to it slowing down for tractors or Amish buggys.
For cargo cycling, this get-up might be surprisingly fast. Today it easily carried up a full load of e-waste up a hill at 16+ miles per hour with only moderate pedaling effort.