The objective of this study is to discuss the probability for introducing the information services to the “ Stop-and-go” merging sections at arterial roads by conducting field experiment of information system. Firstly, the possible procedure and contents of information service are discussed. Secondary, simple prototype of information system is applied to the actual merging sections and we confirm that the information service can reduce driver's decision time if information content is similar to the driver's feeling. Finally, the safety condition of the merging section can be improved by the information service.