Road traffic cones are key to safety when carrying out temporary repair works on roads. They not only guide traffic and warn road users, but also protect workers and equipment on site. The choice of the right cones however requires consideration of a number of factors – from their height and stability to the legal requirements in Bulgaria.

In the following lines we will look at the most important aspects when choosing road traffic cones, to ensure maximum efficiency and compliance with the regulatory framework.

1. Road traffic cones: Height and size – when to use what?

The first and most important criterion when choosing cones for road repairs is height. In Bulgaria, according to Regulation No. 18 of the MRDPW on road signage, the following main sizes are used:

• 30 cm – Suitable for car parks, internal courtyards and pedestrian areas. Not recommended for busy streets.

• 50 cm – For urban environments and low to moderate speed lanes. This is the most commonly used type.

• 75 cm – Mandatory for rural roads and motorways, where speeds are high and visibility must be excellent.

✅ Tip: For repair works in busy areas or in night conditions, always use road traffic cones of at least 75 cm in height with a high degree of reflectivity.

2. Reflective sheeting – safety by day and night

The quality of the reflective sheeting is just as important as the cones themselves. It ensures visibility in the dark and in reduced visibility (rain, fog, snow).

🔸 Standard sheeting classes:

• RA1 (class 1) – Minimum standard, suitable for short‑duration temporary sites.

• RA2 (class 2) – Increased reflectivity. Used in high‑traffic areas.

• RA3 (microprismatic sheeting) – Maximum reflectivity. Mandatory for motorways and night conditions.

📌 According to standards, road cones must have at least one white or silver reflective band, correctly placed around the top part.

3. Materials and durability – important for long‑term repairs

The materials from which the cone is made directly affect its durability in all weather conditions. The most commonly used are:

• PVC (polyvinyl chloride) – Light, flexible, but not very resistant to strong impacts or extreme temperatures.

• PP (polypropylene) – Stronger, resistant to UV rays and moisture. Suitable for prolonged use.

• Rubber base – Adds extra stability, especially in wind or when heavy vehicles pass.

🔧 Cones used in Bulgaria must withstand temperatures from -20°C to +60°C, as well as pressure from vehicles if accidentally driven over.

4. Types of stabilisation – protection against wind and impacts

One common problem on construction sites is cones moving or tipping over due to wind or traffic. Here are the stabilisation options available:

• Heavy rubber base – adds stability without the need for additional weights.

• Additional weighting band – placed at the bottom of the cone.

• Bolting to the ground (for long‑term repairs) – ensures 100% fixation.

💡 Practice in cities such as Sofia, Plovdiv and Varna shows that using weighted cones significantly reduces incidents of displaced signage.

5. Availability of light accessories – night and emergency signalling

For repairs carried out at night or in dark tunnels, the use of flashing lights attached to the cones is mandatory.

🔋 They are:

• Solar or battery powered

• In yellow or red colour

• With at least IP54 water resistance

📍 Requirement of the Traffic Police and municipal services: lights must be placed every 5–10 metres on long sites.

6. Certification and compliance with standards

All cones for road repairs in Bulgaria must comply with BDS EN 13422, which guarantees:

• Visibility in various conditions

• Resistance to climatic influences

• Correct geometry and dimensions

• Impact safety

📌 During an inspection by the Traffic Police or other control authorities, the presence of a certificate of conformity is mandatory.

Choosing the right road cones should not be underestimated – they are a key element of road signage and can directly affect the safety of all road users. Always consider the type of repair, the location and the time of execution. And do not forget – certified cones from a reliable supplier are an investment in peace of mind, safety and legal compliance.

🔶 If you are looking for a reliable solution, SignalPro.bg offers certified road cones, approved for use on construction sites throughout Bulgaria.