No, because, like I said at the beginning, if I didn't have Uber I'd get my own car, and so my marginal cost per car trip would be much lower, and so I'd use it more than the couple of quarterly rides I take nowadays.
Furthermore, Ubers like cabs drive around waiting for fares so they create traffic while not providing rides.
On the other hand, if I need to go some place after work, I'd need to take my car to work during the morning commute, creating extra traffic. Also, there's driving around looking for parking. Finally, there's UberPOOL.
Gas taxes only pay for up to 40% of road maintenance and that's in states with the highest gas taxes.
Fair enough. Sounds like states need to raise their gas taxes. But at least here Uber also pays 23% VAT. Don't they pay sales tax over there?
What I'm getting at is there are costs other than just gas, car payments, maintenance when taking car trips. Things like needing to be alert to drive, parking, and navigating that Uber lowers and creates demand for trips where people otherwise wouldn't drive/take a car and may have foregone altogether.
Furthermore, Ubers like cabs drive around waiting for fares so they create traffic while not providing rides. Similarly with recent cases of Uber driver brigading to drive up surge prices, they also create surges of traffic.
Gas taxes only pay for up to 40% of road maintenance and that's in states with the highest gas taxes. The rest of the cost is made up from general funds and transportation budgets. There was a high profile case recently in Maryland where the governor redirected light rail funds to highway maintenance and construction. In fact gas taxes have never fully covered road construction and maintenance costs anywhere in the US, ever.