Tilemill label and Shield are overlapping, how can this be solved?

Question

I am trying to use tilemill labels and Shield together for my road designing. But there is a problem with that. Please see the following image for better understanding. The shield is ovarlapping the Road name.

I used the following code for my .mss

#road::Labels {
      text-name: [ROAD_NAME];
      text-face-name: "Candara Bold";
      text-size: 16;
      text-fill: #000000;
      text-placement: line; 
      text-halo-fill: #f6f3f3;
      text-halo-radius: 1;
      text-spacing: 400;
      }
    #road::N_Shield {
        [ROAD_TYPE =1]{
        shield-file:  url("C:\wamp\www\shield.png");
        shield-name: [ROAD_NO];
        shield-face-name:"Arial Bold";
        shield-size:16;
        shield-fill: black;
        shield-line-spacing:5;
        shield-min-distance:1;
        shield-allow-overlap:true;
        shield-placement:line;
        shield-dx:150;
        shield-spacing:450;
        }
     }

Anyone can help me what to do.

Answer 1

Try to put shield-allow-overlap:false to avoid overlapping, it should solve your problem.