The Future of Cars

In earlier posts we have commented on how high gas prices appear to have a densifying effect, encouraging people to live closer to where they work and play so that they can avoid the cost of driving. Transit ridership is up. Home prices in urban centers appear to be holding their value better than those in the suburbs. Yet while these trends may develop permanence, it is also important to note that the high gas prices driving this shift are having an equally potent impact on vehicle technology. As technology improves vehicle fuel efficiency, it would make sense that the densifying power of gas prices will be moderated to some extent.

Most people have heard that more hybrid and several new plug-in electric vehicles are coming to auto showrooms in the next few years, signifying a step change in car technology. But there are also significant developments occurring in conventional cars that run on gasoline. And most experts agree that gas will still be an important source of fuel for years to come. It will likely take both innovations to conventional engines and the increasing use of electric cars to wean the country off of oil. Importantly, for vehicles running on gasoline, reductions in fuel consumption translate directly to greenhouse gas reductions: each gallon of gas avoided prevents the emission of about 20-25 pounds of carbon dioxide.

To improve efficiency car makers are focusing on all aspects of a vehicle: its engine, transmission, weight, drag, and rolling resistance. Surprisingly, only a fraction of the energy stored in a gallon of gasoline ever makes its way into the actual powering of a vehicle’s wheels. In fact, more than two thirds of the energy in gasoline is lost by the engine to heat, friction, and idling. More still is lost to the transmission. Automakers are turning to a host of new technologies to fight these losses.

Similar to how the airplane technologies developed for fighters and bombers in World War II led to the first jet-powered passenger aircraft, high gas prices are driving innovations in vehicles that only a few years ago were unimagined or seemed futuristic. Automakers are in some ways facing their own war time situation. Locked in struggle with their competitors, a weak economy, and producing a portfolio of cars that don’t meet consumer’s fuel efficiency needs, it literally is a battle for survival for companies like General Motors. The only way to stay afloat is to innovate and create cars that consumers want – that is, cars that can get more miles per gallon. Whether produced by Ford, Honda, Toyota or GM, it is likely that better cars will emerge from these tough times.

So while transit is alive and healthy, it is also possible cars may emerge from this mess looking better than ever. Which brings up interesting policy questions – assuming we reduce or eliminate the negative environmental externalities associated with automobiles, what should their role be in our future transportation network? How will growth patterns continue to change? Would we seek to infinitely expand roadway capacity? Or would a multimodal approach still be necessary? We’re a long way from needing to answer these questions, but they are worth pondering.

-Daniel Lewis