Red dot appears under traffic cars

Ok, I finally am getting everything to work out for this animation I have to get done, until.... I get a RED dot appearing under some of my vehicles in the traffic animation.  How do you turn off the dot without turning off the cars?  You can't change the traffic lane to a construction element, or else the cars disappear too.  Ignore open elements and text is turned on, so what is the magical trick to turn off the dots???

Thanks,

Kevin