The A4 Torino-Milano motorway covers 125 km and is managed by SATAP S.p.A.   ​

The infrastructure is accessed either from its own tollbooths or from those of the other interconnected Concessionaires, enabling users to cross stretches of motorway operated by different companies in a continuous manner, with a single payment at the destination.  ​

Motorway tolls can be collected using the “closed” or “semi-closed” toll collection systems; for more specific information see the Toll Info section of the website.

The roadway consists of two carriageways, one in each direction, with three lanes in the sub-section between Torino and the Marcallo-Mesero junction and four lanes in the sub-section between that junction and the Ghisolfa tollbooth  ​

The carriageway refers to the portion of the road with all vehicles flowing in the same direction, while the lane is the individual section of a carriageway along which vehicles transit.  ​

The infrastructure is then completed by lay-bys and an emergency lane in each direction of travel, which are not dedicated to transit, only stopping temporarily and in an emergency.  ​

In terms of size, the A4 stretch is a category A motorway, an extra-urban area pursuant to the Decree of the Italian Ministry for Infrastructure and Transport no. 6792 of 5 November 2011, where the design speed is in the range of 90-140 km/h.  ​

The operating speed under normal conditions is generally 130 km/h. Any variations are indicated on the route by the appropriate horizontal signage or shown on the VMS

As motorways are high-speed transport infrastructure, not all vehicles are permitted to use them. Article 175 of the Italian Highway Code identifies permitted and excluded vehicles.

Pedestrians and animals (suitably supervised) may only circulate in the service and rest areas. The emergency lanes may only be used to walk to assistance call points.  ​

Driving a vehicle that is not allowed on the motorway is punishable in accordance with the Italian Highway Code.  ​

Appropriate conduct while driving on motorways is regulated by Article 176 of the Italian Highway Code.  ​​

The infrastructure safety systems include the emergency lay-bys, the A4 stretch has one every approximately 2km and more than half of these are equipped with an SOS telephone with the possibility of requesting mechanical and medical assistance.  ​

In this regard, it is worth reiterating that motorway lay-bys are designed and built solely and exclusively to deal with emergencies, are located on the right-hand side of the carriageway and allow vehicles to stop safely without endangering their own and others’ safety. Prolonged parking is not permitted in these areas, nor may users leave their vehicle there for a long time.   ​

Upon stopping, before getting out of the vehicle, by law users must wear an orange, reflective jacket. This makes sure that users are clearly visible to all those who pass by, who drive along the motorway at high speed, especially at night and in the early morning hours.  ​

Those who fail to comply with this provision are at risk of a penalty under the Italian Highway Code.  ​

The lay-bys are used for emergency situations, they should not and cannot be used for resting or sleeping for any time; if needed, users must rest at one of the 9 equipped service areas.  ​

The services offered in the Service Areas are provided by the economic operators who operate as sub-contractors. For details of the services, please refer to the dedicated Service Areas section of this site.

The Company has adopted a Service Charter as a tool for transparency towards users and in the belief that it will be an opportunity for internal growth and valuable external communication. The Charter, which can be downloaded from Service Charter, contains information on the basic principles and services of the concessionaire, as well as policies and quality management, user protections and a handbook containing useful numbers and contact details. ​

The Charter also includes the circumstances and methods of toll reimbursement and payment of compensation, as well as information channels for up-to-date information on traffic and road conditions.

Non-emergency worksites are scheduled where possible to avoid delays and queues.

In order to reduce the impact on traffic, the most disruptive activities, those involving route and/or junction or service area closures, tend to be scheduled at night wherever possible.

Similarly on the main motorway strip, bottlenecks that involve only one vehicle flow are mainly planned at night where possible. Or, in special cases, in the middle of the day and in any case during off-peak hours.

The A4 does not experience increased summer traffic or any significant holiday exodus traffic. However, the planning of worksites takes into account the higher volumes of users expected on single occasions, such as for specific events: football games, concerts, trade fairs, etc.

These decisions, gained from many years of experience in infrastructure management, are all supported by records and time series of traffic monitoring. Lastly and most recently, the evaluation of the most challenging or atypical worksites, thanks to the increase in IT capabilities that now allow the use of highly complex algorithms (and AI), is carried out using simulation models.