Endurance racing (motorsport) these classes continued to embrace the endurance format. Multiple drivers per car was an early adaptation as the rigors of endurance racing quickly overcome the abilities of most racing drivers to compete solo, although solo attempts on 24 hour races like Le Mans would continue into the 1950s. The various endurance formats were appealing to manufacturers, not only as alternatives to the expense of Grand Prix racing, but also because of its increased relevance to road going models. In automobile endurance racing, three events have come to form a Triple Crown. They are considered three of the most challenging endurance
X Motor Racing and tools for creating cars and track allows using "X-Motor Racing" as professional software for driver training as well as entertainment. The game is used in education, real motor sport and automotive industry for R&D by some teams, for example, Massachusetts Institute of Technology, McGill University, ItalDesign or Red Bull Racing. The developer releases new versions, updates and additional content very frequently. "X-Motor Racing" is a digital delivery product developed independently from scratch. XMR works in single and multi player modes. Single player racing games includes Competition against AI, Hot Lap and Training modes. Multi player races can be launched