The WEG World Championship Combined Driving Event is competed for by four-in-hand drivers only. This means that each driver drives a team of four horses throughout the three competitions of the event. The three competitions are Driven Dressage, Marathon and Obstacle Cones Driving.
In Driven Dressage as in ridden dressage, all competitors drive the same test and are judged on the qualities of “freedom, regularity of paces, harmony, impulsion, suppleness, lightness, and ease of movement and the correct bending of the horses on the move. The competitors are also judged on style, accuracy, and general control of their horses and also on their dress, condition of the harness and vehicle and the presentation of the whole turnout.”

The exciting Marathon competition requires the Driver to drive a course across country, to test the fitness, stamina and training of the Horses, and the Driving skill, judgment of pace and general horsemanship of the competitor. The course is divided into three sections, with a maximum allowed distance of 18 km. The final section includes eight marked obstacles.  Exceeding the optimum time for the entire course and the time taken in each of the obstacles incurs penalties.

The final competition the Obstacle -Cone competition, is to test the fitness, obedience and suppleness of the horses after the Marathon and the skill and competence of the Competitors. The competition requires the competitor to drive his team through a twisting course of cones set close together with balls balanced on top. Going off-course, knocking off a ball or exceeding the time allowed on the course incurs penalties. Final placings are determined by the team with the lowest number of penalties, throughout all three competitions.