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Jefferson County adopts transportation and access amendments to align local standards with industry practice
Summary
The Board approved resolution CC25-156 to revise the county Transportation Design & Construction Manual and related land‑use rules, clarifying relief procedures, trip-threshold study types, and technical standards including a conditional 15% grade allowance for private drives.
The Jefferson County Board of Commissioners unanimously approved a package of amendments on June 10 to the county’s transportation and access standards, adopting resolution CC25-156 after a staff presentation and brief public testimony.
Lindsay Weier, engineering supervisor for planning and zoning, told the board the revisions update street and pavement templates to align with the AASHTO Green Book, clarify intersection spacing and sight-distance rules, and add a reference to the Colorado Department of Transportation. The package removes language that had allowed fire protection districts to approve alternate standards and instead prescribes a county relief process handled administratively by Planning and Zoning.
Key technical adjustments explained by Weier include allowing up to a 15% grade for private driveways and private roads when specific safety and design requirements are met; defining minimum distances from structures to hammerhead turnarounds; specifying when edge drains and stone-mastic asphalt are required; and formalizing four transportation-study types tied to trip thresholds (transportation information for projects under 150 average daily trips, trip‑generation memoranda for 150–800 trips, transportation analyses for certain rezonings, and full transportation-impact studies for sites generating more than 800 trips).
Weier told commissioners that projects already in process will be evaluated under the regulations in place when they submitted their applications but that applicants may request administrative relief via minor variation or alternative‑standards requests. She said relief requests are notified to nearby property owners and referred to affected agencies; planning staff provides a decision memorandum and the director issues final determinations.
Commissioner Kerr moved approval; the motion was seconded and passed unanimously (three ayes). The amendments will be incorporated into the unified land use code as appropriate and replace language in the county’s Transportation Design & Construction Manual, zoning resolution (section 2 and 16), land development regulations (section 15), and storm-drainage technical criteria.
