2005 年 35 巻 2 号 p. 399-413
Workshops for transportation problems are often held recently, where people are easily able to request for better measure of transportation in downtown. Each of them has their own opinion and demand, a better measure for one is bad for others. There are many problems on transportation in downtown such as safety for pedestrians, wiser usage of bicycle and resolution of on-street-parking problem. These result a problem how people share limited the space for transportation. We combined factors such as width of street or sidewalk, control of on-street-parking or installation of bicycle lane to make some countermeasure patterns. Next we performed a survey to the three kinds of participants : pedestrians, cyclists and drivers. The patterns were made simply to be understood by the respondents easily. The survey gave us some utility values of the three groups to the countermeasures. Using this results, it developed that some measure patterns would be able to raise all utility of the three. We also estimated other more real measures. As the result, the functions of roads should be shared with plural roads in the district to rise the utilities.