CRS § 42-4-1001 – Colorado Revised Statutes

“(1) Upon all roadways of sufficient width, a vehicle shall be driven upon the right half of the roadway, except as follows:” (FindLaw, 2022)

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“(a) When overtaking and passing another vehicle proceeding in the same direction under the rules governing such movement;” (FindLaw, 2022)

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“(b) When an obstruction exists making it necessary to drive to the left of the center of the highway;  but any person so doing shall yield the right-of-way to all vehicles traveling in the proper direction upon the unobstructed portion of the highway within such distance as to constitute an immediate hazard;” (FindLaw, 2022)

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“(3) Upon any roadway having four or more lanes for moving traffic and providing for two-way movement of traffic, no vehicle shall be driven to the left of the center line of the roadway, except when authorized by official traffic control devices designating certain lanes to the left side of the center of the roadway for use by traffic not otherwise permitted to use such lanes or except as permitted under subsection (1)(b) of this section. However, this subsection (3) does not prohibit the crossing of the center line in making a left turn into or from an alley, private road, or driveway when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway.” (FindLaw, 2022)

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“(4) Any person who violates any provision of this section commits a class A traffic infraction.” (FindLaw, 2022)

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Source: FindLaw.com – Colorado Revised Statutes Title 42. Vehicles and Traffic § 42-4-1001. Drive on right side–exceptions – last updated January 01, 2022 | https://codes.findlaw.com/co/title-42-vehicles-and-traffic/co-rev-st-sect-42-4-1001/