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Mestre Bypass Motorway
THE PRELIMINARY DESIGN WAS DRAWN UP BY THE REGIONE VENETO IN 1997. SUBSEQUENTLY TECHNITAL WAS CHARGED WITH THE EXECUTION OF THE FINAL AND DETAILED DESIGNS OF A SECTION OF MOTORWAY TO CONNECT THE TWO EXISTING SECTIONS OF THE A4 MOTORWAY (TURIN-TRIESTE), AT PRESENT DIVIDED BY THE MESTRE BYPASS.
Project: A4 Motorway – Mestre Improvement route – Bypass Motorway.
Location: Veneto, Italy.
Client: Passante di Mestre S.C.p.A..
Cost of total Works: 509,813,138.73 €
Services: Final and executive design.
The Mestre Bypass Motorway was first forecast in 1991 with approval of the Regional Territorial Coordination Plan (PTRC). It was indicated in the Regional Transport Plan (1994) and it falls within the multimodal Barcelona - Kiev and Adriatic Sea interchange corridors.
The Mestre Bypass Motorway lies in the metropolitan area of the city of Mestre-Venice, bordered on the south by the Riviera del Brenta, on the west by farmland, on the north east by the Sile river and belongs to the settlement system of the central Veneto region where economic and managerial functions typical of large cities are not concentrated in a single urban area but rather are radially distributed over the territory from the city of Mestre.
The goal of this new infrastructure was to create a motorway system strongly related to the territory, functional to the Veneto settlement system and, in particular, to the Padua-Treviso-Venice area, becoming an alternative motorway to the Mestre Bypass Road which was no longer able to sustain the enormous amount of traffic that crossed it. This infrastructure does so by separating medium-long distance traffic flows, which use the motorway system, from short-medium distance flows which move on the metropolitan road network.
In short, the Mestre Bypass Motorway is the missing link in a "closed" motorway continuity, eliminating barriers for traffic crossing through the area and permitting the existing Mestre Bypass Road, once it is freed of through traffic and open to urban relationships, to take on metropolitan status.
Additionally part of construction of this important road work included construction of a so-called ancillary road service system for municipalities affected by the motorway infrastructure construction. This system provided for reorganization of the network of ordinary roads in function of the new major road, resulting in an improved level of service for some crucial nodes of the existing network and, in some cases, creating bypasses for some of the towns which are now directly crossed by the main road.
Study of new and innovative architectural solutions
Design of the Mestre Bypass Motorway also included a feasibility study for innovative solutions (toll booths and tollgates, noise barriers, lighting design) to better architecturally integrate the infrastructure in its territorial context.
The new tollgates are an architectural evolution of the "totem" concept where the “totem” goes from being an object of signage and information to acquire the function of vertical connection leading to the raised fee collection passage. The solution changes the repetitivity of modules, dematerializing the architectural object and accentuating its lightness with a transparent cover using colored glass that generates an almost immaterial feeling during the transition between light and shadow.
The new architectural solutions for the toll booths were developed based on the concept of perception, since these elements are the only points where the vehicle slows down to a stop and where users can perceive the volumes, the details and the materials. The lightness of the structure, its transparency, the study of light and the analysis of the routes led to the creation of translucent "skins" that become signage interfaces functional to the safety and comfort of the motorway user.
Lighting design aimed to have the infrastructure interact with the territory where it is placed, tying together main features and notable points in a rich and coherent sequence where continuity, rhythm and development creates connections and transitions that are clearly legible along the route.
A new solution was designed for noise barriers using curvilinear panels made from steel sheet metal, plastic sheets or exposed reinforced concrete. The profile of the barrier is not constant but rather is constantly changing shape and inclination.
Main characteristics of the works
- Route length: approximately 32,350 km from Pianiga to Quarto d’Altino;
- Standard section: Category A – Motorways in suburban contexts with three lanes in each direction (L=3.75m) and hard shoulder (L=3.00m) for a total width of 32.50 m;
- No. 2 diamond-shaped interchanges – Spinea interchange and Preganziol interchange;
- No. 3 tollgates –Ve Ovest tollgate, Mogliano tollgate and Ve Est tollgate (plus the temporary Vetrego tollgate);
- No. 8 ancillary roadworks: Roncoduro Underpass, Vetrego Junction, Spinea Toll booth Junction, Improvement route from Robegano to SP Mestrina, Campocroce Ring Road, Terraglio Est – A27 Link, Marcon Junction, SP 64 Zermanesa – A27 Link;
- No. 1 ecological path Psic area.