Long Description: Figure 1. National Network for Conventional Combination Trucks: 2013

U. S. Map using red lines to show Interstates (the National network and National highway systems. Heavy in the East. Yellow lines to shoe the National network on National Highway System, all over the U. S. Green lines to show the National network not on National Highway system, which are heavy in the Midwest. Gray lines indicate other National Highway systems.

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