Learn about transportation projects, construction, planning, and road maintenance. Access transportation programs and maps designed to increase mobility throughout Boulder County.
What’s New?
- 2018 Boulder County Road Map Update – Aug. 2, 2018 Public Hearing with Board of County Commissioners
- Lee Hill Drive/Deer Trail Reconstruction Project – FULL ROAD CLOSURES IN EFFECT EACH WEEK
- Floodplain Remapping Project – PHASE II – Underway
- Upper Fourmile Canyon (Salina to Sunset) Flood Recovery Project – UNDERWAY – Daily road closures
- Gold Run Road Flood Recovery Project – Underway – Expect delays
- Subscribe to the Transportation Email Listserv to receive timely project updates and roadway travel restriction information
Transportation Department Mission Statement:
Boulder County Transportation is committed to providing excellent service and quality transportation infrastructure. We provide a reliable network of roadways, bikeways, trails and transit service to residents and visitors while ensuring the health, safety, and welfare of the public. We plan, construct, and maintain a high-quality, safe, multi-modal transportation network and related services, in a responsive manner, within budget, and on-schedule that results in high customer service.
Unincorporated County Transportation Infrastructure
Boulder County maintains:
- 398 miles of paved road
- 247 miles of gravel road
- 81 major bridges
- 445 large culverts and smaller bridges/access points
- 8,500 small culverts (approximately)
- 19 traffic signals & 7 school-zone flashing signs
Departmental Divisions
Planning Division:
- Development of transportation policies and programs
- Management, planning, and permitting for county floodplains & drainages to minimize flood-related damages to both public and private properties
- Capital project planning and Capital Improvement Program (CIP) development
- Planning & programming of the 2007 Countywide Transportation Sales Tax Program & Projects, including coordination with towns and cities
- Review of land development to ensure safety and mobility and to preserve and protect users of the public right-of-way
Engineering Division:
- Design and construction of all county transportation projects
- Projects include (but are not limited to) – paving, bridge construction, bikeways, shoulders, regional trails, drainage structures
Multi-Modal Division:
- Provides bus, bike, and walk transportation options and systems
- Works with state, regional, and federal partners to secure funding
- Responsibilities include: culverts, dust control, paving, asphalt and gravel, road grading, road signs, snow plowing and removal, tree and brush removal, and many other tasks
- Roadside mowing and weed control is the responsibility of the county Parks & Open Space Department – 303-678-6200
- Ditches are the responsibility of the ditch owner – Learn more
- Road Maintenance contact = 303-441-3962 or the online form
Fleet Services Division:
- Manages the county’s fleet of vehicles and machinery
- Performs maintenance and repairs
- Purchases vehicles and equipment
- Works to improve the fleet’s sustainability