+1, I agree, because many people refuel at the same time. if there is a collision mode, the people behind it cannot add oil, which leads to chaos. if there is no collision mode, the people behind it can easily refuel. the gas station is also a place to rest. if there is a collision mode, the rest of the people cannot rest, only on the high speed. the one-way gas station cannot rest. if there is no collision mode, many people can rest, so the gas station can become a rest station.