Analysis of Driving a Car With a Navigation System in an Urban Area Motoyuki Akamatsu Matsutaro Yoshioka National Institute of Bioscience and Human Technology, Tsukuba, Japan Nobuhiro Imacho Public Works Research Institute, Tsukuba, Japan Tatsuru Daimon Hironao Kawashima Keio University, Yokohama, JapanTo arrive at a destination, a driver requires information such as the current location of the ve