Roundabout “Auf Arzil” in Tyrol - Description of the Roundabout and Documentation of the Road Condition

The first roundabouts as traffic engineering facilities were not built until the beginning of the 20th century, although there were islands in the middle of the streets and marketplaces long before that time. People have always enjoyed statues and water fountains in public spaces, even in ancient Rome. Long ago, there were also traffic islands in England that served as pedestrian oases, and there were also imposing buildings in the heart of market squares in France. However, it was only the "planning border" of all these objects that turned them into traffic roundabouts. The circular roadways at roundabouts are exposed to special traffic loads due to cornering, namely friction and shear stresses, and in smaller roundabouts (mini roundabouts) also torsional stresses (turning of tyres on the spot). Especially due to the high proportion of heavy traffic, damage to the asphalt pavement is often found, such as cracks, unevenness (indentations, ruts), et