Method, system, and computer program product embodiments for conflict detection of vehicles, including aircraft, are presented. According to an embodiment, a method for conflict detection of an aircraft, comprises: reducing one or more vehicle travel paths in a three dimensional space to a first dimension; receiving data corresponding to a motion of the aircraft; mapping the motion to the one or more vehicle travel paths in the first dimension; and transmitting an alert if a potential conflict is determined in the one or more vehicle travel paths in the first dimension. Corresponding system embodiments and computer program product embodiments are also disclosed.