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 "layers": [
  {
   "layerId": 0,
   "layerName": "Posted Bridges",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Bridge closed to all traffic",
     "url": "a236b9decede65975224ccdffbc226d1",
     "imageData": "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",
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     "height": 20,
     "width": 20,
     "values": [
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    },
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     "label": "Posted for load",
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     "imageData": "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",
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     "width": 20,
     "values": [
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   "layerId": 1,
   "layerName": "Open Bridges",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "Open, no restriction",
     "url": "d09f1d11027a2007404cc5be6ee289a7",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAARFJREFUOI3t1L0rBGAcwPHP6S6FgRJdRhYhuctL6JK6wdtkIy/FQtRJKcmgLjHoEoNSbMpgU4abbzEYxGizyF9wMRi8LO44L5N86xme31OfnukX9MsF/8F8hV/Oxe+ALZIqhaX1/xwM6ZAQU6/CpRF3jn4CBnRaMa4O9Jh27ATZ74HlJm1pfbtvaZORcGvzO2CZuDFR1W+TGqWGDdl2gPuvgWHLdrW/m69rd2rFjcRXwFpjelUpefdSImhWt0UNuC4MrLUqqS3v7xdEHVpyZaIQMG5NREhRXjCADRGD+nD2ERgUMWdUU17stQGNukzJSOMxN1hsXlTM3qfcc816nZvxYCc3mJWyL1Ugl7O/s74K7gk1EC657ko9DQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
      "A"
     ]
    },
    {
     "label": "Open, would be posted or closed except for temporary shoring, etc. to allow for unrestricted traffic",
     "url": "884b4e9225553c275a74481a77f740ab",
     "imageData": "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",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "New structure not yet open to traffic",
     "url": "ba3306219530261480df066cc7e3f282",
     "imageData": "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",
     "contentType": "image/png",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "R-Posted for other load-capacity restriction (speed, number of vehicles on bridge, etc.)",
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     "contentType": "image/png",
     "height": 20,
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     "values": [
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