Learn about transportation projects, construction, planning, and road maintenance. Access transportation programs and maps designed to increase mobility throughout Boulder County.
What's New?
Traffic Impact Announcements
95th Street (Lookout to Plateau) Reconstruction/Widening Project – Final paving underway, expect delays Monday through Saturday 8 a.m. to 4:30 p.m.
Lee Hill and Deer Trail Reconstruction Project COMPLETED – ALL TRAVEL RESTRICTIONS HAVE BEEN LIFTED
Lower Fourmile Canyon Drive (CO 119 to Salina) Flood Recovery Project Underway – Paving between CO 119 and Poorman Road, Oct. 4 to 6. No bikes during working hours in this stretch.
Boulder County Road Statistics:
- 398 miles of paved road
- 269 miles of gravel road
- 71 miles of “J” or “Jeep” roads
- 91 major bridges
- 420 minor structures “large culverts and smaller bridges”
- 7,000 small culverts (approximately)
- 19 traffic signals & 7 school-zone flashing signs
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Sustainability Programs
Mobility Choice Blueprint
The Mobility Choice Blueprint is a collaborative strategy to help the Denver metro region identify how to best prepare for and invest in the rapidly changing technology that is revolutionizing transportation mobility. A unique planning and funding partnership of CDOT, DRCOG, RTD and the Denver Metro Chamber is creating the Mobility Choice Blueprint – a coordinated strategic direction for the evolving mobility of the region related to walking, bicycling, driving, and transit. The 2030 Blueprint will analyze travel trends and technologies in the region, explore an evaluate various technologies and their implications for mobility, align transportation investments of multiple public agencies, and create new planning and implementation partnerships.
Subdivision Road Maintenance
The Boulder County Comprehensive Plan (BCCP) provides guidance on gravel and paved roads accepted for maintenance in unincorporated Boulder County. The BCCP stipulates that funding for major repairs should be prioritized for the county’s arterial and collector roadways, and that funding of local access roads (aka “subdivision roads”) shall be the responsibility of those served by the road (property owners).
While the county does not conduct major repairs (full roadway resurfacing) on subdivision roads, our Road Maintenance crews still conduct operations on these roads, including: snow removal; pothole patching; clearing of ditches, culverts, and other drainage structures; replacement/repairs of sidewalks; and, roadway crack sealing and patching to maintain public safety.
Department Divisions (hover over image to learn more)
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
Multimodal Planning Division
- Provides bus, bike, and walk transportation options and systems
- Works with state, regional, and federal partners to secure funding
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
Learn more about Boulder County’s Fleet Electrification goals!
Operations Division
- Development of transportation policies and programs
- Management, planning, and permitting for county floodplains & drainages to minimize flood-related damages
- Capital project and Capital Improvement Program (CIP) planning
- 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 the public right-of-way
Road Maintenance
- Our Road Maintenance team keeps our roads safe and clean!
- 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