The replication stretches
The ‘BrennerLEC after-LIFE’ project envisages, among other things, the application of variable
speed limit measures for traffic and environmental purposes on the entire Alpine section of
the A22, i.e. from Brenner to the intersection with the A4 motorway.
The main measure is related to the application of variable speed limit reduction for
traffic purposes, applied to the entire section on both the southbound and northbound
carriageways, with initial focus on the Vipiteno-Ala section. The application of this measure
is functional to the gradual integration of the hard shoulder running measure when
technically ready to be tested.
The second measure concerns the integrated dynamic traffic management between
motorway and city. The activation of the measures is dynamically determined with the aid
of a complex diagnostic and forecasting model, which is able to assess current and
forecast traffic and air quality conditions. A first version of this model was developed within
the BrennerLEC project and is going to be continuously refined and improved through the
BrennerLEC after-LIFE project.
The original “after-LIFE” project also foresaw the variable speed limit reduction measure for environmental purposes, limited to the “urban” sections of the A22 motorway near the towns of Bressanone, Bolzano, Trento and Rovereto, together with the experimental section in the Bassa Atesina area, which was introduced as part of the BrennerLEC project and maintained to protect the town of Egna. The rapid renewal of the vehicle fleet observed during the recent years, particularly with regard to older generations of diesel vehicles, has rendered this type of measure essentially environmentally ineffective; it will therefore not be further developed or implemented.
