Long Description: Figure 2. National Network for Conventional Combination Trucks: 2013

U. S. Map Showing routes longer than 60 feet. Yellow lines doubles less than 100 feet and are prominent in Washington State, Utah, Wyoming, and South Dakota. Red lines are doubles up to and over 100 feet. Red lines are present in North Dakota, and Oklahoma with less of a presence in Colorado, Kansas, and a single line present across Northern Illinois, Indiana, and Ohio. A single Red line is also present in Florida. Brown lines doubles less than 100 feet and triples. Brown lines a predominant in Oregon, Nevada, Idaho, and Montana. Gray lines are the National highway system.

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