The DGT warns: do not cross these black lines on the road because they can be dangerous.

Road trips are undoubtedly a fascinating experience, but you don't have to embark on a journey of thousands of kilometers to encounter curious things on the road. Almost every driver in Spain has encountered some curious, winding black lines on the road while driving, although very few really know what they are and, above all, what dangers they pose.

The reality is that these road markings were not placed on the roads by any organization, nor did they appear "by magic," but rather are the result of the deterioration of the asphalt itself. However, they can pose many threats to mobility, so it is important to avoid them whenever possible to avoid an incident while driving that could endanger both your own and others' road safety.

What are the black lines on the road?

These mysterious black lines appear when the asphalt cracks due to deterioration. Weather conditions can cause the tar to split, creating these openings in the road. These black lines are simply the workers sealing these cracks. In most cases, instead of resurfacing the entire road, they simply fill in the gaps.

This solution isn't definitive, but it is the fastest and most effective way to ensure the road isn't closed to traffic for long periods of time and allows cars to drive on it. Although the speed and low cost of repair are the two major advantages of this method, the reality is that it also poses risks to driving that many users are unaware of.

The dangers of crossing black lines

The General Directorate of Traffic (DGT) warns that crossing one of these black lines could cause you to skid and lose control of your car, as they lack the grip of asphalt and are much more likely to cause an accident. Therefore, it's best to avoid crossing them whenever possible to avoid unnecessary risks.

These black lines are found in many parts of Spain's road network , so the next time a driver encounters them, they'd better avoid them. These repairs are most commonly seen on interurban roads and in rural areas, where weather conditions are more extreme and maintenance is less frequent.