What is a delineator post used for?

A delineator post guides drivers along the edge of a lane or roadway by marking the path with a vertical, retroreflective post. It is most often used in parking lots for drive-thru pickup lanes, school car lines, ADA path edges, and lot perimeters where painted edge lines fade or disappear under wet or snowy conditions.

How tall is a standard delineator post?

The MUTCD requires a 4-foot minimum mounting height for delineator reflective elements on public roadways. Parking-lot installs commonly use 36-inch flex posts, which place the reflector at headlight-beam height for passenger cars. Heights above 48 inches are rare outside highway-shoulder applications.

Are delineator posts and flex posts the same thing?

Flex post is a product variant of a delineator post. All flex posts are delineators, but not all delineators are flex posts. Delineator is the regulatory term used in MUTCD Section 3F; flex post is the industry term for the polymer-flex variant. Surface-mount, base-mount, channelizer, and tubular markers are the other variants.

How are delineator posts anchored to pavement?

Three methods are common. Surface-mount posts use an epoxy adhesive plus a mechanical anchor (bolt or expansion anchor) drilled into the pavement. Base-mount posts use a removable socket set into the pavement and a spring-loaded post that pulls free. In-ground posts are buried 12 to 18 inches in concrete, which is rare in retrofit parking-lot work.

Do delineator posts need to be reflective?

Yes. MUTCD Section 3F requires retroreflective sheeting on the visible face of the post. ASTM D4956 defines the sheeting types -- Type III, IV, or IX in increasing brightness. Type IV is the standard for parking-lot installs in Oregon, balancing visibility against cost.

What Is a Delineator Post? 2026 Buyer's Guide

A delineator post is a vertical, retroreflective traffic-control device that visually guides drivers along the edge of a roadway, lane, or parking-lot path. Most delineators are 36 to 48 inches tall, anchored to pavement, and made of flexible polymer that recovers after vehicle impact. The Federal Highway Administration covers placement, spacing, and reflectivity in MUTCD Section 3F, the federal spec that governs delineator use on public roads.

Cojo installs delineators across Oregon parking lots, drive-thru pickup lanes, and school drop-off zones. This guide covers the five product families, the MUTCD specs that drive selection, and how to match the right delineator to the right job.

What problem does a delineator post solve?

A delineator post answers one question for the driver: "Where does the lane go?" When pavement markings are wet, snow-covered, sun-glared, or simply faded, painted edge lines stop working. A vertical post above the pavement holds the line of sight even when the ground does not.

For parking-lot owners, the practical problem set is narrower:

Drive-thru pickup queues that drift across painted lanes
School car-line lanes that need clear left-edge separation
Retail-lot lane channelization at peak shopping hours
ADA path-of-travel separation from drive aisles
Snow-region edge marking where plows obliterate paint by January

Delineator posts solve all five without the cost or footprint of a bollard or curb extension.

What are the main types of delineator posts?

Five product families cover almost every parking-lot installation. The Manual on Uniform Traffic Control Devices (MUTCD) Section 3F.01 defines the device class; manufacturers split it into the variants below.

Type	Best For	Typical Height	Recovery After Impact
Flexible (flex post)	Parking lots, drive-thrus, edge lines	36 to 48 in	High -- polymer memory
Surface-mount	Retrofit installs, no-core scenarios	36 to 48 in	High
Base-mount removable	Valet zones, event lanes, seasonal use	36 to 48 in	High -- pull-out base
Channelizer	Lane shifts, taper warnings	28 to 42 in	Medium
Tubular marker	Short-term lane shifts (90 days or less)	18 to 36 in	Medium

The dominant choice for parking-lot work is the flexible surface-mount post. It anchors to existing asphalt or concrete with epoxy and a mechanical fastener, recovers after most passenger-car impacts, and meets MUTCD retroreflectivity rules with Type IV sheeting per ASTM D4956. For a deep dive on the flex-post variant, see our delineator vs flex post breakdown.

How does a delineator post differ from a bollard?

The two devices look similar from a distance and are often confused at the spec stage. The functional split is clear: a delineator guides, a bollard stops. Our delineator vs bollard comparison covers the call in detail. The short version:

A delineator is a visual cue. It does not absorb impact energy. A car can drive through a flex post and the post returns to vertical.
A bollard is a physical barrier. It is rated to absorb impact energy at a rated speed (most security-grade bollards meet ASTM F2656 or similar) and is designed to stop a vehicle, not bend.

If the goal is to keep cars out of a pedestrian zone, choose a bollard. If the goal is to keep cars in a lane, choose a delineator.

What does MUTCD Section 3F require?

The Federal Highway Administration publishes the MUTCD (fhwa.dot.gov MUTCD). Section 3F governs delineator use, with these load-bearing rules for parking-lot installs:

Mounting height (3F.04): 4 feet minimum from pavement to bottom of the retroreflective element on public roadways. Parking-lot variance is common -- 36-inch posts are the most-installed product in private lots, but the visible reflective panel still must be high enough to read at headlight beam height.
Color (3F.04): White on the right side of the lane in the direction of travel, yellow on the left. Blue is reserved for hydrants. Red is reserved for wrong-way traffic.
Spacing (3F.05): Variable by application. On tangent (straight) sections, 200 to 530 feet on highways, much tighter (10 to 40 feet) on parking-lot edge lines and curves.
Retroreflectivity: Sheeting per ASTM D4956 Type III, IV, or IX depending on required brightness. Type IV is the standard parking-lot specification.

Oregon DOT supplements MUTCD in ODOT Traffic Manual for state highways. Local jurisdictions may add city-specific overlays for sidewalk-adjacent installs.

For the full spacing math, see our delineator spacing MUTCD guide.

Where does a delineator post belong in a parking lot?

Five locations earn a delineator more often than not:

Drive-thru pickup lane edges -- 6 to 10-foot spacing along the queuing edge keeps cars out of the parking row to the left of the lane.
School car-line dividers -- 8 to 12-foot spacing along the centerline keeps two opposing-direction lanes separated when paint is the only other tool.
ADA path-of-travel edges -- separation between accessible route and drive aisle. Combine with parking lot striping basics for the painted layer.
Edge of large open lots -- where there is no curb, a 30 to 50-foot delineator pattern defines the lot's outer perimeter.
Construction-phase channelization -- temporary tubular markers during overnight re-strip work, then replaced with permanent flex posts after cure.

On a 22,000-square-foot Beaverton retail center we channelized in February 2026, we set 47 white flex posts at 8-foot intervals along the right edge of the drive-thru queue. The lot owner had been losing two to three queue jumpers per day. Post-install, the drift complaints dropped to zero in 30 days.

How much does a delineator post cost?

Industry Baseline Range

Component	Typical Cost
Flex post (36 in, surface-mount)	$25 to $55 per post
Flex post (48 in, surface-mount)	$40 to $85 per post
Base-mount removable	$60 to $120 per post
Channelizer	$35 to $70 per post
Installation labor (per post)	$15 to $40
Adhesive and anchor hardware	$4 to $12 per post

These figures reflect published industry averages. Current market pricing varies significantly and actual quotes may fall well outside these ranges based on site-specific conditions, material costs, and project complexity.

Current Market Reality

Polymer flex-post raw-material cost climbed in 2025 alongside fuel and resin. Type IV reflective sheeting prices jumped roughly 9 percent in the same period. Labor for a 50-post drive-thru job runs longer than the per-post math suggests because traffic-control setup is a fixed-cost overhead. Expect a real Oregon drive-thru install to land at the upper third of the table above. For a precise number, contact Cojo.

What about Oregon-specific install rules?

Oregon parking-lot delineator installs do not require a state permit, but state-highway-adjacent work falls under Oregon DOT permit rules. City sidewalk-adjacent work in Portland requires coordination with Portland Bureau of Transportation per Title 17. Salem, Eugene, and Bend each maintain their own ROW permit process.

For local install pricing and code references, see our delineator installation Portland Oregon page.

Get a delineator quote for your lot

Delineator posts are one of the highest-impact, lowest-cost upgrades a parking-lot owner can make. They cost less per linear foot than re-painting a fading edge line, and they hold visibility through wet, dark, and snowy conditions where paint quits. Cojo installs flexible delineators, surface-mount channelizers, and removable base-mount posts across Oregon. Contact Cojo for a site walk and a quote, or learn more about our striping services.