The Association for the Study of Peak Oil and Gas has the abstract of the report. A key section of that abstract reads:
Improved fuel efficiency in the world’s transportation sector will be a critical element in the long-term reduction of liquid fuel consumption, however, the scale of effort required will inherently take time and be very expensive. For example, the U.S. has a fleet of over 200 million automobiles, vans, pick-ups, and SUVs. Replacement of just half with higher efficiency models will require at least 15 years at a cost of over two trillion dollars for the U.S. alone.  Similar conclusions generally apply worldwide.

Commercial and near-commercial options for mitigating the decline of conventional oil production include: 
1) Enhanced Oil Recovery (EOR), which can help moderate oil production declines from older conventional oil fields;
2) Heavy oil/oil sands, a large resource of lower grade oils, now produced primarily in Canada and Venezuela;
3) Coal liquefaction, an established technique for producing clean substitute fuels from the world’s abundant coal reserves; and
4) Clean substitute fuels produced from remote natural gas.

For the foreseeable future, electricity-producing technologies, e.g., nuclear and solar energy, cannot substitute for liquid fuels in most transportation applications.  Someday, electric cars may be practical, but decades will be required before they achieve significant market penetration and impact world oil consumption.  And no one has yet defined viable options for powering heavy trucks or airplanes with electricity.