Japan’s three biggest automakers are considering collaborating over vehicle software to increase development efficiency as electric vehicles gain a growing share of the market, sources familiar with the matter said Thursday. Toyota Motor Corp., Honda Motor Co., and Nissan Motor Co. aim to standardize part of their software to promote collaboration with their parts suppliers and IT firms over vehicle controls and developing services, the sources said. The automakers are expected to unveil the tie-up at a study group meeting to be held by the industry ministry in the near future, the sources sai…