TRANSPORTATION RESEARCH DELEGATION NEWS NUMBER ONE

The bulk of the pamphlet is a summary of three completed research projects. The first was an attempt to develop and test a theory of drivers' route choice in urban areas. From 1500 interviews, drivers' preferences and estimated travel times were ascertained. From these results, and certain other requirements, the model was constructed. It was found that, while travel time is the most important consideration, the number of stops and turns, road width, etc., are also important. The second was an attempt to develop and test methods for traffic actuated control of isolated signal intersections. The project was carried out in five stages - criteria for signal control, literature inventory of control strategies, development of strategies, simulation, and field tests. It was found that vehicle actuated signal timing can be studied within the same theoretical framework as fixed-time signal timing. Together with equipment for selective bus detection, vehicle-actuated controllers can reduce average bus delay by 20 percent. Traffic-actuated control with optimization logic for minimization of operating costs can reduce average bus delay by 40 percent and average vehicle delay by 25 percent. The third was a study of safety in public transportation for persons in wheel-chairs or who have difficulty walking. Most Swedish municipalities have special vehicles for such persons. The study shows that the present system of seat belts is unsafe, and makes suggestions for new systems. Desirable dimensions are given for ramps and hoists to help the passengers enter and leave the vehicle. The rest of the pamphlet consists of a short article on the applications to the transportation research delegation for research money in addition to announcements of a paper on traffic control in 14 Swedish population centers, the appointment of a committee for a project on movable platforms. A project to study taxis, and a trip by the transportation research delegation to Oslo.

• Corporate Authors:

  Transportation Research Delegation

  Stockholm,   Sweden 
• Publication Date: 1975-2

Language

• Swedish

Media Info

• Features: References;
• Pagination: 9 p.
• Serial:
  • Volume: 2
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Actuated traffic signal controllers; Persons with disabilities; Public transit; Research; Route choice; Traffic actuated controllers; Traffic delays; Transportation; Travel time; Urban areas
• Old TRIS Terms: Transportation research
• Subject Areas: Operations and Traffic Management; Planning and Forecasting; Research; Society; Transportation (General);

Filing Info

• Accession Number: 00072242
• Record Type: Publication
• Source Agency: Transportation Systems Center
• Files: TRIS
• Created Date: Jan 16 1981 12:00AM