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Safety risks at traffic light installations
2001 (English)Report (Other (popular science, discussion, etc.))
Abstract [sv]

As a consequence of growing traffic density in urban areas, time and vehicle

actuated traffic controls are more and more often used. This paper presents a

research in which flexible traffic light controls were examined for possible

safety deficits. It was necessary to prove the following theory: it is

suspected in the case of microscopic light control programs with flexible

green periods that there is a higher safety risk, in comparison to fixed-time

control for drivers who have local road knowledge during the change of

signals (from yellow to red). An unexpected red light or a denied green at an

"All-Signals-Red-At-Once-Green" -light could lead to unexpected reactions of

the road user. Possible conflict situations are emergency braking, rear-end

collisions and running the red light. To compare flexible controlled and

fixed-time controlled intersections, these types of conflict were analysed.

The investigation contained a selection of traffic light controlled

intersections in several German cities (e. g. Stuttgart, Würzburg and Aalen).

The study encompassed two intersections with fixed-time control, ten

intersections with traffic-actuated control and three intersections with

"All- Signals-Red-At-Once-Green" control. In a second measuring series at two

intersections in Bremen, different control methods were tested under

identical local conditions: fixed time control, semi-vehicle-actuated control

and fully traffic-actuated control.

Place, publisher, year, edition, pages
Statens väg- och transportforskningsinstitut., VTI konferens , 2001.
Series
VTI konferens, ISSN 1104-7267
Keyword [en]
English, Sweden, Conference, South Africa, Traffic light, Vehicle actuated, Fixed time, Measurement, Accident, Risk, In situ, Red light, Offence, Braking, Rear end collision, Conflict
Research subject
Road: Traffic safety and accidents, Road: Junctions and traffic safety; Road: Traffic engineering, Road: Traffic control and traffic information
Identifiers
URN: urn:nbn:se:vti:diva-4952OAI: oai:DiVA.org:vti-4952DiVA: diva2:673781
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf