The study systematically compares 13 transport, energy and climate studies. The general conditions (GDP, population, oil prices) are compared with the transport forecasts. The result shows a wide range of elasticities of the studies to variations in these conditions. Lower oil prices lead to around +3 to +6% more passenger transport by 2030 and +8 to +18% more freight transport. Two additional instruments are recommended to meet the climate targets in 2020 and 2030: (1) a reliably increasing fuel price path through annual adjustment of energy tax rates, and (2) a Renewable and Efficient Vehicles Act (EEFG). The EEFG grants a bonus for the purchase of efficient cars and e-vehicles. This is financed by revenue from a malus surcharge on the purchase of an inefficient, high-CO2-emitting car.