The success of automation for intelligent transportation systems (ITS) is ultimately contingent upon the interface between the users (humans) and the system (ITS). The issues of variable message signs (VMS) and traffic signal device (TSD) design were studied in this project. Well designed VMS and high TSDs will get better driver response. Those messages or signals will serve the intended purpose of helping the ITS function effectively. In this project, computer simulations and experimental design were conducted to determine the significant factors such as size, colour, and shape, which might affect driver response. In addition to the commonly used circular-shaped traffic signals, other shaped signals were also included in this study. VMS are programmable message bulletin boards that are used to provide information about changing condition on highways to improve operations, reduce accidents, and inform drivers. This project studied the VMS used in present transportation systems and explored potential improvements through designed experiments. It evaluated the impacts of several factors on the design and display of VMS as the effectiveness of VMS depends upon their colour scheme, format, size, wording, etc. (Author/publisher)
Abstract