We counted them. It took 36 years, 250,000 volunteers, and one very tired satellite.
Cones in service worldwide, rising at the observed net rate of 167 per minute.
One hundred cones are drawn below. Each one stands for one hundred million real cones. This is the whole world population of traffic cones, at a scale where every cone you have ever personally seen is a rounding error inside a single glyph.
That is 1.21 cones for every person alive. Laid end to end they reach the Moon and back nine times. Stacked, they would form a column 7.5 million kilometres tall, which nobody has attempted, because the base cones fail at roughly layer 340.
No single method sees every cone. A cone in a warehouse is invisible to a satellite; a cone in a ditch is invisible to a manufacturer. The census triangulates.
4.1bn
A classifier trained on 90,000 hand-labelled cones, run across 2.3 million square kilometres of aerial imagery. It sees cones from directly above, which is the worst possible angle for a cone.
Confuses cones with fire hydrants, small dogs, and one cone-shaped hedge in Lisbon.
6.8bn
Output figures from 240 moulders going back to 1961, less an attrition model derived from how long a cone survives once a truck has met it. Cones are durable and almost never formally retired.
Strong on output, weak on attrition. Nobody files paperwork when a cone dies.
11.9bn
Volunteers walked 34,000 one-kilometre transects and counted every cone in sight, including cones in gardens, cones on bollards, and cones being worn. Extrapolated by road density.
Accurate locally, poor globally. Volunteers walk where the cones already are.
Weighted by coverage and checked against 1,400 ground-truth plots, the three estimates converge on 10.0 billion, ±0.9 billion at 95% confidence.
Read the methodologyCone density tracks paved road length far more closely than it tracks population, which is why this looks nothing like a population table.
| Region | Cones | Share of world total | Per person |
|---|---|---|---|
| East & South Asia | 3.61 | 36.1% | 0.80 |
| Europe | 2.44 | 24.4% | 3.26 |
| North America | 2.08 | 20.8% | 3.51 |
| Latin America | 0.87 | 8.7% | 1.31 |
| Middle East & Africa | 0.71 | 7.1% | 0.32 |
| Oceania | 0.29 | 2.9% | 6.44 |
| World | 10.00 | 1.21 |
Oceania is not an error. Australia's per-capita stock of 7.1 is the highest ever recorded, driven by long rural roadworks and a cultural reluctance to collect cones afterwards.
| Device | Total | Share |
|---|---|---|
| Cones | 6.41 | 64.1% |
| Tubular markers | 1.32 | 13.2% |
| Drums (barrels) | 1.08 | 10.8% |
| Vertical panels | 0.71 | 7.1% |
| Barricades | 0.48 | 4.8% |
| All devices | 10.00 |
Drums outweigh cones by roughly nine to one, so although they are a tenth of the count they are well over half the tonnage. Barricades are the rarest type and the least likely to be moved by a member of the public.
Global Cone Census, fourth edition. Field period 1990–2026. Released under no licence anyone has checked.
We combine aerial image classification, manufacturer output reconciliation and volunteer roadside transects to estimate the number of traffic cones in service worldwide. The three methods disagree by 7.8 billion, which is most of this document. After coverage weighting and attrition correction we report a central estimate of 10.0 billion units, ±0.9 billion at 95% confidence.
The census counts channelizing devices of every type — cones, tubular markers, vertical panels, drums and barricades — and converts them to a single standard counting equivalent, the 750 mm two-collar cone. A unit qualifies if it stands unaided, is taller than 300 mm, and is intended to redirect traffic of some kind. Colour is not a criterion: we count the blue cones used at airports and the green ones used by a small number of Nordic municipalities. Small sports markers are excluded and tracked separately.
A cone remains in service until it can no longer stand on its own. This threshold is permissive and it does real work — requiring an intact base would remove an estimated 1.4 billion units from the total. We keep the permissive version because a leaning cone still functions, and because volunteers found the intact-base judgement impossible to make consistently in the rain.
Eᵢ is the estimate from method i and wᵢ its coverage weight; S is the stored-stock correction for cones sitting in depots and yards; D is the double-count deduction. The weights are 0.31 for orthophoto, 0.44 for manufacturer reconciliation and 0.25 for transect sampling.
Orthophoto counting undercounts because a cone viewed from directly above presents a circle roughly 360 mm across — close to the resolution floor of most public imagery, and identical in plan to a great many other objects. It also cannot see indoors, and roughly a fifth of the world's cones are indoors at any moment.
Manufacturer reconciliation overcounts unless attrition is modelled well, and attrition cannot be modelled well, because the destruction of a cone is not an event anyone records. We fitted a survival curve to 4,100 individually tagged cones tracked since 2011 and extrapolated. The curve has a long tail. Cones are remarkably hard to kill.
Transect sampling overcounts globally because volunteers walk where volunteers are, and volunteers are in cities, and cities have cones. We call this cone-seeking bias and correct for it by road-density stratification, which helps but does not solve it.
Traffic cones are one of the most recognisable road safety tools in the world, and they have an interesting history and many surprising uses.
The first modern traffic cone was invented in 1940 by Charles D. Scanlon, a street painter for the City of Los Angeles, who was unimpressed with the wooden tripods and barriers then used to mark roads being repainted — he considered them easily broken, hard to see, and a hazard to passing traffic. His design was a hollow, ballasted cone that returned upright when struck by a glancing blow. Scanlon and his partner Rodney B. Taylor, who ran a local tyre shop, built the first examples by sewing together strips of used tyre skins. The patent was granted in 1943 as US 2,333,273, the Safety Marker. Early road markers were heavy and breakable — some were concrete — and by the 1960s lightweight plastic had become the standard. WikipediaTraffic Safety DirectTraffic Safety Store
Traffic cones were first used in the United Kingdom in 1958, when the M6 opened. They replaced the red paraffin lantern burners used during construction of the Preston Bypass. In the United States, on 1 May 1959, the Pacific Gas and Electric Company in Oakland, California adopted a policy of placing orange cones at the left front and left rear corners of parked service trucks, to make passing drivers aware of workers nearby. The policy came from a suggestion by a PG&E cable splicer named Russell Storch. Wikipedia
In the United States the specification is set by the Federal Highway Administration's Manual on Uniform Traffic Control Devices. Cones must be predominantly orange, and made of a material that can be struck without damaging the vehicle that hits it. For daytime work on low-speed roads the minimum height is 18 inches; on freeways, other high-speed highways, and for night work on any highway, the minimum rises to 28 inches. Night use requires retroreflectorisation or lighting: a cone of 28 to 36 inches carries a 6-inch white band set 3 to 4 inches from the top, with a second 4-inch band about 2 inches below it. Cones over 36 inches use alternating orange and white retroreflective stripes 4 to 6 inches wide, at least two of each, top stripe orange. The conical form is stable but light enough to reposition by hand, and the moulded knob on top — the boss — is a mounting point for caution tape, lamps and small signs. FHWA MUTCDWikipedia
Most of what people call a traffic cone belongs to a wider category the MUTCD calls channelizing devices: cones, tubular markers, vertical panels, drums and barricades. All five do the same job — warning road users about work activity and guiding them past it — and all five must be crashworthy, meaning they can be struck without seriously damaging the vehicle that hits them. Two of the common names are informal. A barrel is a drum. A pylon is a cone, a usage most common in Canada and in sport. FHWA MUTCD
Cones mark construction zones, accident scenes and detours, but they turn up well beyond the roadway: driving schools use them for manoeuvring courses, sports coaches use them to mark boundaries and drills, cycling instructors use them for training, and they are used informally to reserve parking spaces and mark paths through parks. OptSigns
In short: traffic cones have gone from simple wooden markers to highly visible, versatile safety devices that protect workers, guide drivers, and turn up in sports fields and training grounds along the way.
Straight answers, including to the question this website is named after.
Ten billion, according to the fourth edition of the Global Cone Census. The estimate combines three independent counting methods — orthophoto classification, manufacturer output reconciliation and volunteer roadside transects — weighted by coverage and checked against 1,400 ground-truth plots, giving ±0.9 billion at 95% confidence. That works out to 1.21 cones for every person alive.
Cones are difficult to count because they are durable, stored out of sight between jobs, and never formally retired, so manufacturer output alone will not tell you how many remain in service.
A barrel is properly called a drum, and it is a separate class of device. A cone is 18 to 28 inches at minimum depending on the road; a drum is at least 36 inches high and 18 inches across the top, with horizontal orange and white stripes 4 to 6 inches wide and an optional warning light. Drums are used where a bigger, heavier, more visible device is wanted — higher speeds, longer closures, exposed conditions — because they read from further away and are not blown or knocked aside as easily. FHWA MUTCD
Another word for a traffic cone. The usage is most common in Canada and in sport, where "pylon" is the ordinary term for the markers set out for drills. No standards body uses it; the MUTCD calls the device a cone. FHWA MUTCD
The formal category is channelizing devices, and there are five: cones, tubular markers (slim vertical tubes), vertical panels (striped panels with 45° stripes sloping toward the side traffic should pass), drums (the orange barrels) and barricades (striped rails on a frame, Types I, II and III). All must be crashworthy. Longitudinal channelizing devices — the long interlocking plastic walls — are a sixth type used to form a continuous barrier. FHWA MUTCD
Under the MUTCD, spacing in feet should not exceed the speed limit in miles per hour when the devices form a taper, and not more than twice the speed limit in feet along a straight tangent run. On a 60 mph road that means a device every 60 feet through the taper and up to 120 feet along the closure. FHWA MUTCD
Charles D. Scanlon, a street painter working for the City of Los Angeles, designed the first modern traffic cone in 1940 to keep cars off freshly painted road markings. His patent, for a device called the Safety Marker, was granted in 1943 as US 2,333,273. Wikipedia
Orange gives the strongest contrast against road surfaces, vehicles and most natural backgrounds in daylight, which is why it is the standard colour for temporary traffic control. Other colours are reserved for specific purposes — blue at airports, for instance. In the United States, cones used on highways must meet the MUTCD requirements for colour and luminance. Traffic Safety Direct
There is no single standard height, but in the United States the MUTCD sets minimums by situation: 18 inches for daytime work on low-speed roads, and 28 inches on freeways, other high-speed highways, and for night work on any highway. Many agencies specify 36 inches on interstates. Retroreflective banding requirements differ for cones of 28 to 36 inches and for those taller than 36 inches. FHWA MUTCDTraffic Safety Direct
The earliest cones were rubber, originally sewn from scrap tyre material and later moulded from rubber sheet. Plastic took over from the 1960s onward and is now standard. PVC recovered from recycled bottles can be used to make new cones. Wikipedia
In 1958, when the M6 opened. They replaced the red paraffin lantern burners that had been used during construction of the Preston Bypass. Wikipedia
It is called the boss, and it is a mounting point. Caution tape, warning lamps, small signs and cone bars all attach to it, which lets a line of cones become a continuous barrier rather than a row of separate markers. Wikipedia
Driving schools use them for manoeuvring courses, sports coaches for marking boundaries and drills, cycling instructors for training, and people generally for reserving parking spaces and marking temporary paths. OptSigns
David Morgan of Burford, Oxfordshire, who holds the Guinness World Record. He also believes he constructed the first experimental plastic traffic cones, in 1961, while working at Imperial Chemical Industries. Traffic Safety Direct
The census is open. If you have counted the cones on your street, your campus, your county or your country, we want the figure. Questions, corrections and disputes about our arithmetic are equally welcome.
Useful things to include
or write to trafficconefactsinfo@gmail.com
It does. It is more cones than people, which is the part that unsettles most readers. The intuition fails because cones are counted where you see them and stored where you do not. A single motorway resurfacing contract can hold 40,000 cones in a yard for a decade between jobs.
No. The census counts units above 300 mm with a weighted base. Sports markers outnumber road cones roughly four to one and are tracked separately. They are not in any figure on this site.
A cone is in service until it can no longer stand unaided. A cracked, faded, tyre-flattened cone that still stands is a cone. This is a generous definition and we say so plainly in the methodology.
Nobody, which is both the strength and the entire weakness of the project.
Maybe. But is anything really real? You decide.