The objects when viewed in layouts through viewports, the objects are total jumbled up and nothing like the ones created in modelspace. I have uploaded two pictures, first one is the road that I designed in modelspace, and the second one is when viewed in the layout.
Inside the Viewport, type PLAN and then World.
In addition to what tcorey suggests, make sure your layout is setup corrrectly with the right scales setting.
Run the plot command and make sure the Plot scale is set to the correctly to relate model units to paper units in a 1 to 1 ratio. (Apply to Layout and exit plotting after setting this)
Then set you viewport to match your model space scale and you should now see the same results in the viewport as you see in model space. (you may need to regen to see the result)
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