3D traffic signs in rfa format

Hi. I have a rfa file that includes 6 traffic signs 3D, it has been created in Revit:

but when I open or reference it with OpenRoads, graphically I only see a traffic sign, the one that is active in Revit:

there are 6 signals but I only see 1:

 CC_SeƱal_Peligro.rfa

I am attaching the rfa file and please tell me how I can select the rest of the signals. Thank you!