Learn about transportation projects, construction, planning, and road maintenance. Access transportation programs and maps designed to increase mobility throughout Boulder County.
What’s New?
- 95th Street (Lookout to Plateau) Reconstruction/Widening Project Starts in April – Open house April 10 to discuss this and other Niwot Area projects set to begin this spring and summer.
- Work will require daytime, weekday lane closures – Expect delays
- US 287 & Isabelle Road Intersection Safety Project Open House April 17 in Erie
- Lee Hill and Deer Trail Reconstruction Project Starts in April
- Work will require lane closures – Expect delays
- CDOT SH 119/Boulder Canyon Drive Reconstruction Project – March 2019 to October 2020
- Expect travel delays and road closures between Boulder and Nederland
- Project email = CO119@PublicInfoTeam.com
- Project Hotline with Updates = 720-465-6898
- Transportation Master Plan (TMP) Update Underway-
- NEW & IMPROVED – Snow Removal Route Map
- Lower Fourmile Canyon Drive (CO 119 to Salina) Flood Recovery Project Underway – Expect delays of up-to 15 minutes
- Upper Fourmile and Gold Run Road projects remain under construction in Fourmile Canyon, but are on hold until spring 2019
- Daytime, weekday, non-resident cycling restrictions also remain effective (last updated Jan. 9, 2019)
- 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 Road Statistics:
- 398 miles of paved road
- 269 miles of gravel road
- 71 miles of “J” or “Jeep” roads
- 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