The Bangkok Research Project studied some of the fundamental characteristics of the severe traffic congestion in Bangkok. It involved surveys of traffic speed, flow, composition and vehicle occupancy, the results of which were used to derive speed/flow and traffic density characteristics and to assess the efficiency of each road considered in terms of its passenger carrying ability. The project also studied current traffic signal operations (including police control at signals) and tested a manual method for estimating passenger car equivalents. The operation and economic effects of a range of mid-link pedestrian crossing facilities within and outside the major one-way system were assessed. In addition, the operation and economics of bus lanes, on sections of road monitored in earlier research, were evaluated and comparisons were made with the results of the earlier research.

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