Conceivably, I could decide to make three trips (to B, C, and D) instead of just two trips (to B and C) because Uber is cheaper/nicer/better/etc than other form

Conceivably, I could decide to make three trips (to B, C, and D) instead of just two trips (to B and C) because Uber is cheaper/nicer/better/etc than other forms of travel. My demand for travel is somewhat elastic, not completely set before I know the cost of travel.