-Open-graded friction courses (OGFC)
In addition to low-noise pavements, there are other road surface modifications that can reduce traffic noise, such as quieter bridge decks or rumble strip designs.2
How it Helps
Road Pavement Properties:
Various road surface properties—including texture, porosity, air flow resistance, stiffness, climate resistance, and several others—can impact noise levels.4,6 For example, porosity can play an important role in sound absorption, where highly porous surfaces reduces the compression of air between the tires and the road. Since different low-noise pavement options will vary in these properties, it is important to consider these factors when determining which design to choose.
One of the major downsides to low-noise road pavements is the relatively high cost when compared to conventional surfaces.3 Additionally, the durability of these surfaces may not be as high as other options. Therefore, its cost efficiency should be analyzed to determine the benefits of implementing low-noise pavement instead of other noise-reduction strategies, such as noise screens.