By coincidence we crossed into Portugal today. It is our first visit to this country and I did not know for sure how long we would stay, or if we would use motorways and how often, so we crossed this afternoon on the A24 from Verin to Chaves.
It is one of 4 entry points were you come off the motorway at well signposted locations and can sign up for the easytoll system. Simply stop at the machine, it will talk to you in about 4 languages. Pop a credit card in remove it, take your receipt, check that the camera has captured the correct registration number and off you go. Signed up for 30 days, all automated.
As it happens we came off the motorway about 800mt further on and are in Chaves tonight. Hopefully will not use it much.
Davy