All through-traffic lanes that do not exit and are not dedicated-use lanes are considered main lanes. This is sometimes referred to as the main line of a freeway or highway on AARoads. The main line is also the main route of a highway. Alternate, business, bypass and truck routes are considered auxiliaries of the main line.
About the Author: Alex
Cofounder of AARoads.com. Webmaster of both AARoads and Interstate-guide.com. Former cartographer for Mapsource, Inc. and Universal Map Group, LLC. Map specialist for GIS Cartography & Publishing Services.
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