SINGAPORE (Reuters) - Southeast Asia's Grab is jointly investing S$6 million ($4.4 million) with the National University of Singapore to launch an artificial intelligence (AI) laboratory to help improve the efficiency and utilization of vehicles on its platform. The lab's efforts will expand to research on challenges such as congestion in Southeast Asian cities, Grab and NUS said in a statement on Wednesday. The AI lab is the latest move by Grab to leverage its vast trove of data and growing user base to improve its services. Last month, it received a $1 billion investment from Toyota Motor Corp in a partnership that includes data sharing. The lab's research could provide more personalized services to passengers, improve driving safety through better understanding of driver behavior as well as improve precision in mapping pick-up points, Grab and NUS said.