Summer Holiday road trip using the new ferry link between Cyprus and Greece and then a 1500km road trip to Romania via North Macedonia and Serbia.
-- In Greece there are multiple toll gates on the highway ranging between 1 euro to 4 (from Piraeus to Evzoni border crossing is around ~30 euros toal.
-- In North Macedonia is smaller and way cheaper total is around 7-10 euros you will need a GREEN CARD if your insurance is not covering it. You can buy one at the border crossing 38:48 in the video 50 euros for 2 weeks but less days are available cheaper.
-- In Serbia you get a white ticked at the toll gate where you join the highway then when you exit you pay according to how much distance you did. Crossing Serbia costed 15-18 euros
-- In Romania you are lucky if you find highways :D there is a short one ~40+ km between Timisoara and Arad no tolls but you have to buy "Rovinieta" vignette around 6 euros per week or 16 per month.