
N-I/A-15 (AT Sistema)
What is it
AT Sistema is Gipuzkoa’s pioneer response to EU Directive 199/62/CE for shared maintenance of the N-I and the A-15 between Gipuzkoa Provincial Council and the goods hauliers who use these two high capacity roads.
On passing beneath the gantries and signaling masts, and with no need to stop the vehicle or reduce its speed, the system detects, classifies and charges heavy goods vehicles weighing more than 3,5 tons, either by means of the VIA-T compatible TAG on board the vehicle or by reading its number plate.

Objectives of AT-Sistema:
How it functions
- The system detects the vehicle and classifies it by means of a laser reader.
- Another reader also scans the front number plate at the same time.
- If the vehicle has a TAG (Via-T) device, an antenna system will interact with it and automatically identify it. If not, it will be identified by means of the number plate reader.
- Based on said data, AT Sistema will proceed to charge the toll with no need to stop the vehicle or for any kind of physical transaction.
- Finally, once through the gantry, the system will scan the rear number plate. A double reading to guarantee data consistency.
Who it's for
Where
From January 2023, AT System is implemented on all segments of the A-15 and N-I highways within the province of Gipuzkoa.
Vehicle plate reading points have been implemented on all accesses and exits to these two highways, allowing the calculation of the route for each user.

Registering with AT Sistema
Toll and method of payment
Canon
A price per kilometer (including VAT) is established depending on the vehicle category:
According to the Foral Budget Standard 2023 of Gipuzkoa, from January 2023 different discount rates apply on the indicated rates depending on:
- Vehicle EURO emissions class
- The number of transits carried out