It is free to tow RV in the service area. There is no parking fee in the high-speed service area. Drivers who often drive on expressway know that there is a service area at intervals on expressway, where drivers can park (for free), refuel and rest. Now the high-speed service area is getting better and better, and many service areas are also equipped with charging piles to charge electric vehicles, which is very convenient. At present, there is no clear parking time regulation for how long the expressway service area can stop. This means that car owners can park in expressway service area as long as they want. But it should be noted that parking for a long time means leaving expressway for a long time. This involves another cost, which is the high-speed overtime fee. It is also because of the existence of high-speed overtime fee that the parking time in high-speed service area becomes limited, not as long as you want. Of course, for some reasonable long-term parking, even overnight parking, the high-speed overtime fee can be exempted. Drivers can keep relevant information and explain it to the staff at the toll booth. Generally, the toll booth staff will not overcharge the driver.