The fixed-time traffic signal coordination strategy is a proper alternative for improving urban traffic condition in Thailand for three main reasons: it is compatible with most existing traffic signal controllers without additional equipment installation; it requires shorter implementation time; and there are less expenditures compared to adaptive coordination strategies. Despite the benefits of traffic signal coordination and computer traffic simulation technology being clearly proved, they have not been widely used in Thailand. The number of registered vehicles has been increasing annually by an average 7 per cent since the 1990s. The dramatic increase of vehicles without improvement of road and traffic control facilities leads to many serious traffic issues to Bangkok and other large cities in the country. Most traffic signal controls in Thailand are now operating with individual fixed timing systems. Inadequately phased timing and unsynchronized neighboring traffic signals in a network are the major cause of traffic issues. (a) For the covering entry of this conference, please see ITRD abstract no. E214666.
Abstract