URL:https://media.istockphoto.com/vectors/rounded-traffic-signal-in-blue-and-white-isolated-on-white-background-vector-id1307796314?k=20&m=1307796314&s=612x612&w=0&h=Ai6oegLYf9f0SiO-oeNRFdIQGoPBZqJ6c_Ug0ehdAy0=
掲載元:https://www.istockphoto.com/illustrations/20-mph-sign