That gas is cheaper is "no reason" to use your car more time? People are likely to think more reasons to travel if is easier to travel, the barrier to entry is always an important deciding factor, e,g. if I visit my romantic partner once a week I may start visiting them a bit more if it gas prices don't raise much but my income does, also when looking for a new car more likely to buy a gas vehicle than an electric one, and companies may end up reaching similar conclusions, e.g. a a potential client that is too far away so gas prices are a significant factor can offer a better rate if gas prices drop or at least increase slower than their profits.