ODOT Roads and Transportation

The ODOT Roads and Transportation dataset is consumed from an external ArcGIS web service via the following URL and ID

https://navigator.state.or.us/ArcGIS/rest/services/Framework/Trans_GeneralMap_WM/MapServer
ID: 0, 1, 3, 4

OpenLayers

If you are developing in OpenLayers, you will want to use the OpenLayers ArcGIS93Rest class.

An example of your solution might look similar to the code below.

layer = new OpenLayers.Layer.ArcGIS93Rest(
    "ODOT Roads and Transportation",
    "https://navigator.state.or.us/ArcGIS/rest/services/Framework/Trans_GeneralMap_WM/MapServer/export",
    {
        layers: "show:0, 1, 3, 4",
        transparent: true
    },
    {
        isBaseLayer: false
    }
);
map.addLayer(layer);