Japanese firms are stepping up their drive to introduce autonomous vehicles at Tokyo’s Haneda airport, a transportation hub for both domestic and international travelers, and its nearby area. In Haneda Innovation City, a commercial and business complex near the airport, Level 4 self-driving buses — vehicles fully automated under certain conditions — will carry people within the premises for free. The 11-passenger vehicles will operate on an 800-meter route at a maximum speed of 12 kilometers per hour, with their status monitored remotely. The project involves Boldly Inc., a subsidiary of mob…