Parking Lot
No-Passing Zone Marking Warrants and Sight Distance
Cojo
July 9, 2026
6 min read
A no-passing zone is a stretch of two-lane road where drivers may not cross the centerline to pass, marked by a solid yellow barrier line. The zone is warranted -- not chosen by feel -- where the available passing sight distance drops below the minimum needed for the posted speed. Sight distance is measured in the field over hills and around curves, and where a driver cannot see far enough ahead to complete a pass safely, the broken centerline becomes solid. This guide explains how no-passing warrants are determined, how passing sight distance is measured, and how the centerline is marked in Oregon.
A no-passing zone tells drivers that passing is prohibited in their direction of travel because the road geometry hides oncoming traffic. On a two-lane highway, it shows up as a solid yellow line on the driver's side of the centerline. A double solid yellow means passing is prohibited in both directions. Where the solid line is paired with a broken yellow, passing is allowed only from the broken-line side.
The zone exists to prevent head-on crashes. Crest vertical curves (hills) and horizontal curves (bends) limit how far ahead a driver can see. When that distance is too short to pull out, pass, and return before meeting oncoming traffic, passing has to be banned for that segment. Intersections, driveways with heavy turning movements, and railroad crossings can also warrant a barrier line even where the sight line itself is open.
Passing sight distance is the length of road a driver can see ahead, measured from a driver's eye height to an oncoming vehicle or object of a set height. Crews establish this in the field, sighting along the road over each crest and around each curve to find where the visible distance falls below the minimum for the speed. The two points that matter are where the sight line first closes down and where it opens back up -- those become the ends of the barrier line.
The minimum required distance grows with speed, because a faster road needs more room to complete a pass. The MUTCD, adopted in Oregon through ODOT, sets the warranting sight-distance values by speed.
| Posted speed | Passing needs | Marking result |
|---|---|---|
| Lower speed roads | Shorter sight distance | Fewer, shorter no-passing zones |
| Moderate speed roads | Moderate sight distance | Zones over most crests and curves |
| Higher speed roads | Long sight distance | Longer, more frequent zones |
Once the warrant is set, the marking is straightforward but precise. The centerline transitions from a broken yellow (passing permitted) to a solid yellow barrier line at the point where sight distance drops below the minimum, and back to broken where it recovers. The start and end points are located during layout so the transition lands exactly where the sight-distance analysis says it should.
Key marking rules crews follow:
The broken-line portion follows the standard skip ratio covered in skip and dashed lane line striping, and the solid barrier line is a continuous painted or thermoplastic centerline.
On the ground, a no-passing job is a survey task before it is a paint task. A crew drives the corridor and marks the sight-restriction points, often placing a temporary spot at each broken-to-solid and solid-to-broken transition. Those spots get checked against the sight-distance readings, then a stringline or the striper's guide follows them so the machine lays the barrier line to the mark rather than to a striper's guess. On a rural two-lane in hilly terrain, this can mean a rolling operation with a lead vehicle, the striper, and traffic control moving together, frequently at night or in off-peak hours to keep the lane closure short. Glass beads are metered into the wet line in the same pass so the finished barrier is retroreflective the first night it is open.
The failures are usually about placement and durability, not the paint itself:
Oregon's terrain generates a lot of no-passing zones. The Coast Range, the Cascades, and the Blue Mountains put crests and curves on nearly every rural highway, and the wet climate makes retroreflectivity critical so the barrier line stays visible in rain and at night. Glass beads and, on high-traffic corridors, thermoplastic help the centerline hold up.
Weather also constrains when the work happens. Centerline striping follows the same roughly May-to-October dry-season window as all Oregon long-line work, since paint needs a dry surface to cure. No-passing marking often accompanies other line and crossing work on the same corridor -- crossings are covered in ADA on-road crossing and ramp marking.
A double-yellow centerline uses twice the paint of a single line and, on rural highways, usually needs traffic control, which drives cost up. Thermoplastic centerlines cost more up front but last far longer on high-traffic corridors.
Industry Baseline Range: road striping runs about $800 -- $4,500+ per mile for a single paint line and $2,000 -- $9,000+ per mile for a double yellow centerline, plus a $150 -- $600+ mobilization fee and a $350 -- $1,000+ minimum on small jobs.
These are industry baseline ranges for planning only -- actual pricing depends on surface condition, layout complexity, material (paint vs thermoplastic), line footage, night/traffic-control needs, and current market conditions. Get a site-specific quote.
No-passing zones are warranted by sight-distance measurement, not opinion, and the solid yellow barrier line has to land exactly where the road geometry hides oncoming traffic. Getting the warrant and the transition right is a safety-critical part of centerline striping. Cojo is CCB Licensed and Insured, based in Hood River, and stripes centerlines statewide across Oregon and the I-5 corridor. Start with our Oregon road striping and line painting pillar, see our striping services, or request a free estimate.
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