1. A method comprising: identifying a first road vehicle and a second road vehicle, that are traveling on the same road as a third road vehicle; tracking the first road vehicle to determine a first observed trajectory of the first road vehicle, the first observed trajectory including a first location passed by the first road vehicle; tracking the second road vehicle to determine a second observed trajectory of the second road vehicle, the second observed trajectory including a second location passed by the second road vehicle; calculating, by a processor, a third location using a mathematical formula based on the first location and the second location, the third location being different from both the first location and the second location; including, by the processor, the third location in a generated trajectory; and changing at least one of a speed of a third road vehicle and a direction of the third road vehicle based on the generated trajectory.