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Motor Vehicle Handbook
The Emissions Section of the DMV administers enforcement and nancial management
aspects of the Automobile Inspection and Readjustment (AIR) program, while the Motor Vehicle
Emissions Program in the Department of Public Health and Environment's Air Pollution Control
Division certies the AIR program's testing procedures and equipment, program development,
and data analysis. The AIR program is designed to reduce motor vehicle pollution in the state by
requiring motor vehicles operated in Boulder, Broomeld, Denver, Douglas, Jeerson, and parts
of Adams, Arapahoe, Larimer, and Weld Counties to undergo emissions testing and be subject
to requirements for emission‑related repair work. To learn more about the state's emissions
requirements, visit the Emissions section of this handbook.
The Titles and Registrations Section of the DMV administers the titling and registration of
motor vehicles and performs a number of enforcement and fee collection functions involving
commercial vehicles and the trucking industry. The section ensures that commercial vehicle
operators and their motor vehicles are in compliance with all relevant state and federal laws and
regulations including: compliance with weight and size limits, safety and insurance requirements,
and possession of required licenses, registrations, and permits. Visit the DMV's International
Registration Plan page for more information related to motor carriers. Specic travel permitting
requirements are handled by the CDOT Commercial Vehicle Permits Oce. Visit the DMV's
Titling a Vehicle page for information related to titling a vehicle. Visit the DMV's Registration
Requirements page for information related to vehicle registration.
Department of Transportation (CDOT)
The Department of Transportation is responsible for maintaining, repairing, and plowing
Colorado's state highway system, which includes interstates, U.S. highways, toll roads,
and numbered state highways in Colorado, under the policy direction of the 11‑member
Transportation Commission.
Regional transportation plans. The state’s transportation planning process begins at
the regional level. CDOT gathers input from the 15 planning regions to develop regional
transportation plans for each region. The plans typically establish a region’s long‑term
transportation investment priorities, and are incorporated in the Statewide Transportation Plan.
Statewide Transportation Plan. State law requires CDOT to produce a 20‑year plan, updated
every ve years. The current Statewide Transportation Plan (2045) estimates needs and revenue
from 2020 to 2045. The plan outlines CDOT's overall funding plan, identies the future needs of
Colorado’s transportation system, establishes CDOT's vision and goals for the state, and outlines
strategies to achieve these goals.
Statewide Transportation Improvement Program. Federal regulations require CDOT to
develop a Statewide Transportation Improvement Program (STIP), which is a four‑year planning
document for state transportation projects. CDOT updates this plan annually. Projects included
in the annual plan come from the 20‑year statewide transportation plan.
CDOT resources. CDOT maintains information about road and weather conditions at www.
cotrip.org or by calling 511. Construction reports can also be accessed through CDOT's Travel
Center. For information about CDOT's safety initiatives, visit the CDOT Safety page. This resource
guide also includes more information about High Occupancy Vehicle and Toll lanes; visit CDOT's
website for general information about Express Lanes.