List of Mexican Federal Highways
Every state in Mexico builds and maintains their own state highways, which supplement the federal network. Some of these roads are unnumbered; those that have varying numbering schemes depending on the state. Shields for these roads contain the abbreviation of the state up top. State highways that are tolled, like their federal counterparts, bear a D in their designations, such as Sinaloa State Highway 1D.
State highways
This is a list of numbered federal highways ("carreteras federales") in Mexico. The letter "D" (for Directo) is added to the road number for all toll roads.