If you drive a passanger car, caravan, truck...you can buy serbian electronic toll device for about 15-20 euros and save your time on toll ramps even if you are stranger! Be aware that the new toll gate called Presevo, near macedonian serbian border is opened from 12.12.2016. Big toll gate is being built near Belgrade close to Ikea and it will be ready for sezon 2017. TAG toll device is prepaid, when you upload the money, it is emmediately avaliable. You can buy it when entering country, on Gazprom stations, at national drivers club post, etc...beleieve me, everyone who travels through those gates in july and august can kill himself, you wait about an hour if you dont have electronic toll device!