It is well known that vehicle fuel consumption is reduced with the electronic toll collection (ETC) technology, but there is no empirical data about the quantity of fuel reported. In order to get accurate data, an experiment was performed. A family car with 1.4 liter displacement was used as the experimental object. The fuel consumption was collected as the vehicle was passing by the manual toll collection (MTC) lanes and ETC lanes. From results, the authors can see that ETC technology can bring to us very considerable economic benefits.