That's interesting idea, but it'd be very challenging to scale. Most rural towns have far fewer restaurants compared to cities, and of those restaurants, a significant portion serve food that's not sufficiently different/better from gas station food to justify paying a premium for it. It doesn't seem out of the realm of possibility to create an app that lets truckers queue up an order ahead of time - but even if you did, you're ultimately catering to a dying market/industry that'll inevitably disappear sooner rather than later.

You'd better research how many truckers would be able to afford it first.

The biggest startup opportunity is in truck parking. Learn about it. There is money there for anybody with a tenable solution.