Roads & Transportation

Roads & Transportation

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.


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

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.

Learn more about maintenance and repairs of local access/subdivision roads in unincorporated Boulder County.

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

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

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

Contact Us

Transportation Department

Submit a question


2525 13th Street
Boulder, CO 80304

Map & Directions

Hours: 8 a.m. - 4:30 p.m. M-F

Mailing Address

P.O. Box 471
Boulder, CO 80306