WYR cut transportation costs by half or cut transportation time by half?
Either perk applies to anything that you ride on that uses some kind of motor (like a motorized scooter, vehicle, bus, plane, ship). This does not include transportation where you, another person, or an animal exert energy (like walking, riding a bike, riding a horse).
For cutting transportation time, this ability will magically make it so everything conveniently works out so you get to a location twice as quick, even if you're in a traffic jam. This ability does not make vehicles faster (it uses unusual powers to move you faster). If you use your own vehicle, your vehicle will still wear down like if you travelled normally, including gas, oil, battery. This ability does not apply when waiting in a line at an airport or waiting for a taxi/bus.
For cutting transportation costs, if you use your own vehicle, the cost of maintaining the entire vehicle will be cut in half, including gas, oil, battery, as well as getting new tires, spark plugs, or anything else that is needed to keep the vehicle running legally. This ability does not apply to cosmetic things like radios, paint jobs, AC.