Why Squiggled Darker Lines Are Pervasive on US Streets and What They Mean for Road Maintenance

Introduction

For many drivers, the sight of squiggled darker lines on the roads is a familiar and often displeasing sight. These “tar snakes,” as they are colloquially known, are actually a form of crack sealing, a common maintenance practice used to prevent water infiltration and extend the life of asphalt surfaces. This article explores the reasons behind the prevalence of these lines, the benefits of crack sealing, and how it affects road maintenance and overall driving experience.

Understanding Squiggled Darker Lines

Crack Sealing: A Safety Measure

The term “squiggled darker lines” is commonly used to describe the application of crack sealant on roadways. These lines are not a sign of poor road construction or a sign to question if the road is safe to drive on. Instead, they are a precautionary measure taken by local authorities to prevent future road damage.

Crack sealant is a liquid binder that is applied to asphalt cracks. This process helps seal the cracks and prevents water from entering the pavement. The ingress of water can lead to further deterioration of the road surface, potentially resulting in the formation of potholes. Potholes are not only an aesthetic issue but can also pose safety hazards for drivers and passengers, making driving on roads an unpleasant experience.

The Process of Crack Sealing

Prevention of Water Infiltration

The application of crack sealant is similar to fixing a leaky roof. Just as water can destroy a house if it is allowed to seep through the roof, water can also weaken and eventually damage a road if it penetrates the asphalt. By sealing the cracks with liquid binder, the integrity of the base rock is preserved, leading to a more durable and prolonged pavement lifespan.

Cost-Effective Maintenance

Crack sealing is generally less expensive than a full-width grind and pave of a roadway. This makes it a cost-effective solution for maintaining the quality and safety of the road. Repaired roadways, as a result of crack sealing, are much less prone to developing potholes, thereby reducing the frequency of major road repairs and the overall cost of maintenance.

Popular Terminology and Common Misunderstandings

Crack Sealing vs. Road Patching

Sometimes, the term “tar snakes” is used interchangeably with crack sealing. However, it is important to note that road patching involves filling in larger areas of the road, often using tar, to prevent water from seeping in. This is typically a more extensive and long-term solution compared to crack sealing, which is meant for smaller cracks and fissures.

Use in Different Countries

The use of crack sealant is not unique to the United States; it is a common practice in many countries around the world. The process is designed to be cost-effective and efficient, making it a preferred method for maintaining roadways in urban and rural areas.

The Driving Experience

Quality of Surface

While the lines may appear unsettling, they are a relatively minor inconvenience in the grand scheme of road maintenance. Most drivers find that the driving experience is not significantly impacted by these temporary lines. In fact, the prevention of potholes and water damage can make the overall road surface more predictable and enjoyable to drive on.

Conclusion

Crack sealing, the application of squiggled darker lines on roads, is a crucial practice for maintaining the integrity of road surfaces and preventing further damage. While it may be an unsightly addition to the road, its benefits far outweigh the temporary disruption it causes. As a driver, understanding the purpose and benefits of these lines can help alleviate any unease or frustration associated with them.

Key Takeaways:

Crack sealing is a maintenance practice used to seal asphalt cracks and prevent water infiltration. The process is cost-effective and helps preserve the longevity of the pavement. It is a common, understood practice in the United States and other countries. Temporary disruptions are necessary to ensure a smoother and safer driving experience.

I think you are referring to the tar poured into cracks in the street to prevent water seeping through the otherwise impervious layer. It is a quick and cheap way to extend the life of a sealed asphalt or bitumen surface. Most motorcycle riders refer to them as “tar snakes” and try to avoid them because of the different quality of the surface on them - not a problem for a car though!

Final Thoughts:

In summary, the squiggled darker lines are a vital part of road maintenance designed to ensure safety and longevity. While they may be a visual nuisance, their significance in preserving the quality of the road surface cannot be overlooked. So, when you see these lines, rest assured that they are serving a necessary and important purpose.