During the purchasing process, select the date you plan to arrive. After making the online payment you will receive a voucher via email with you reservation code.
On the date of your reservation, drive into the car park (ticket holders can use the left-hand lane), show the voucher containing the details of your reservation to the operator, take your ticket and park in the parking space indicated to you. During your stay, you must leave the keys in the ignition.
Upon leaving, before going to collect your vehicle go to the ticket office with your Parclick receipt and the ticket you were given when you arrived. The operator will check that the code on your ticket is valid and will then validate your ticket to allow you to leave the car park.
Piazzale Roma, 496