Traffic cones – how to safely set up a detour?
- Kristof
- Jun 11, 2026 views
- 65
Proper securing of temporary road works, accidents, and lane changes requires the use of highly visible and certified safety devices. In this area, traffic cones represent an indispensable tool that warns drivers of upcoming obstacles. Carefully planning and setting up a temporary detour is crucial for the safety of both road crews and motorists. We will examine the core guidelines for setting up secure detours using professional warning cones.
Expert tip: When setting up detours on highways, always use traffic cones with a minimum height of 75 or 100 cm equipped with high-intensity reflective collars. This provides drivers with adequate time to notice the lane change and safely adjust their speed.
Legal and technical regulations for setting up detours with traffic cones
The use of traffic cones on public roads is strictly regulated by local transportation authorities. These devices must meet specific standards for height, weight, stability, and retroreflectivity. Setting up a detour generally requires an approved temporary traffic control plan from the municipal or road management agency. Placing cones on public streets without authorization, for example to reserve parking spaces, is illegal and can result in safety hazards.
Road cones serve a warning and guiding function, directing drivers along a path that bypasses the work zone. They should be arranged in diagonal lines (known as tapers) with a slope appropriate to the speed limit of the road. A taper that is too short can lead to serious collisions, especially at night or during conditions of reduced visibility caused by heavy rain or fog.
Geometry of a safe detour – how to position the cones?
The most important element of a properly configured detour is the transition taper, which gradually guides vehicles into the adjacent lane. The length of this taper depends on the speed limit of the road – on highways, it must be significantly longer than in residential areas. The traffic cones should be spaced at intervals of no more than 3 to 5 meters along the transition taper and up to 10 meters along the work area.
To ensure maximum safety, the start of the detour should be accompanied by active warning signs or flashing lights. Using traffic cones with reflective collars ensures that the headlights of oncoming cars are reflected from several hundred meters away. This allows drivers to reduce speed smoothly and change lanes without sudden, dangerous braking directly in front of the barrier.
Comparison of popular traffic cone models for road safety
To help you select the appropriate equipment for your road management needs, we have prepared a comparison of two popular models of high-quality traffic cones designed for heavy-duty use:
| Specification | Traffic Cone 100 cm | Traffic Cone 75 cm |
|---|---|---|
| Buy online (Link) | Buy traffic cone 100 cm | Buy PVC traffic cone 75 cm |
| SKU | PA100PERECR1_70 | PA75PVCREC_126 |
| Body material | Polyethylene with heavy rubber base | Flexible polyvinyl chloride (PVC) |
| Total weight | Approx. 7.0 kg (stable in wind) | Approx. 4.0 kg (high stability) |
The role of materials in harsh weather conditions
When selecting traffic cones for detours, the material of the cone is critical. Cheap cones made of standard rigid polyethylene (PE) are lightweight and easily damaged by vehicle impacts. When run over, they usually crack or crush permanently. On the other hand, a professional reflective traffic cone 100 cm made of flexible PVC has shape memory, which allows it to bend flat under a vehicle and spring back to its original shape afterward.
The weight of the cone determines its stability against strong winds and turbulence caused by fast-moving trucks. Lightweight one-piece cones can be easily knocked over, which is why highways require two-piece traffic cones with a heavy base made of recycled vulcanized rubber. The low center of gravity ensures that the cone stays in place, maintaining a clear path for vehicles in all weather conditions.
Compatible accessories for improved detour visibility
A detour line made of cones can be enhanced using compatible system accessories. LED warning lights can be mounted on top of the cones to emit a flashing amber light, significantly increasing visibility at night. Additionally, expandable telescopic barrier bars can be placed over the cone tops to create a physical barrier that prevents pedestrians or vehicles from crossing into dangerous areas.
Unlike heavy steel barriers, these modular accessories are lightweight, easy to transport, and can be set up or dismantled in minutes. This saves time and increases efficiency for road utility crews and construction companies during temporary road work.
Frequently asked questions (FAQ)
What traffic cones are required for highway use?
For highways, regulations require cones with a height of at least 75 cm or 100 cm. They must feature Class II reflective collars and have a heavy base to prevent them from being displaced by the wind generated by large trucks.
Can I put out traffic cones on a public road without permission?
No, placing any traffic control devices on public roads requires a permit and an approved temporary traffic control plan from local authorities. Unauthorized blocking of lanes is illegal and subject to fines.
What is the benefit of PVC cones compared to PE cones?
PVC cones are flexible and have shape memory. If run over by a car, they bend without cracking and return to their upright position. PE cones are rigid and will crack or break when run over by vehicles.
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