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In a life cycle assessment (Life Cycle Assessment, LCA), the individual processes of a product system are analyzed in detail regarding their environmental impacts. All relevant resource consumption and emissions throughout the entire life cycle – including all...

The adjustment of the regulation on the avoidance and disposal of waste (VVEA; SR 814.600, 2015) increasingly restricts the landfill options for removed asphalt. This legal development promotes the use of recycled asphalt (Reclaimed Asphalt Pavement, RAP) and ...

With the progressing climate change, heat stress and the number of tropical nights in cities and agglomerations are clearly increasing in Switzerland. In densely built areas, the so-called urban heat island effect intensifies summer heat: pavements made of asp...

By reducing the rolling resistance of the vehicle, fuel consumption and pollutant emissions can be decreased. The surface texture of the road pavements significantly influences the rolling resistance. The potential for savings through low rolling resistance ro...

The quality of the building materials lays the foundation for a quality SDA surface. Even before production, it must be ensured that aggregates, binders, and mastic meet the high requirements for durability, texture, and grip. Aggregates SDA mixtures are bas...

The mixture forms the technical interface between the tested individual materials and the installed layer. The goal of the success control is to ensure that the composition and processing correspond to the design. The quality of the mixture is the decisive in...

After installation, the finished layer will be checked for its density, layer thickness, and compaction. These parameters are crucial for load-bearing capacity, service life, and acoustic performance. Core drill analyses - core samples provide information abo...

The surface of an SDA pavement affects driving comfort, safety, and noise development. Therefore, evenness and texture should be checked. Evenness: Longitudinal evenness: Deviation of the surface in the direction of travel; affects driving comfort and roll...

Grip is a safety-relevant success parameter and is measured during acceptance and periodic control. Measuring Methods Pendulum test (SRT): localized testing with a standardized pendulum. SKM trailer: dynamic measurement over longer sections; practical in ...

Acoustical evaluation forms the core of the performance monitoring of low-noise SDA surfaces. It serves to quantify the actual noise reduction effect achieved in operation and to track the acoustic development over the service life. Objective and Importance ...

The acoustical emission differences between low-noise and conventional surfaces can be up to 10 dB(A). Although residents in the transition area also benefit from a noise reduction, abrupt level changes occur at the transition, which can be perceived as very a...

Due to the high mechanical loads from braking and accelerating buses or from centrifugal forces in tight turning radii, a concrete surface is very often used, especially at bus stops and roundabouts. However, concrete roadways are often significantly louder th...

Another disturbance potential arises from road markings, distinguishing between structural markings (textured markings mixed with quartz sand) and pure color markings. Structural markings offer advantages over color markings in terms of visibility and adhesion...

If detectors for traffic light systems are embedded in the roadway and no level differences occur, they do not cause disturbing impulse noises and thus have no impact on noise emissions and noise exposure. If the detectors are mounted on the surface of the SDA...

When crossing tram tracks in a transverse direction, impulse noises may occur. However, crossing in a longitudinal direction has no significant impact on noise emissions. There may only be a slight frequency shift into the high frequency range. Since the tram ...

In general, it should be noted that low-noise surfaces lose effectiveness on steeper gradients (>8%), but still reduce noise emissions. This influence is situation-dependent and is related to an increased share of engine noise in the total emissions in the gra...