Interstates 25, 70, and 76.
US Highways 50, 287, 40, 6, 83, 84, 85, 24, and 285.

No Hazardous Materials.

State highways are maintained and managed by state governments, while national highways are maintained and managed by the central government. National highways typically connect major cities and serve as part of the national transportation network, whereas state highways connect cities and towns within a specific state.

The two types of road are national highways and state highways. National highways go anywhere and are owned and maintained by the government of the country (such as the Interstate in the USA). State highways are roads contained within a single state. The state government is responsible for maintenance of these roads.

Interstate 70 and Interstate 76