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4-0 and 3-1 contraflow workzone areas: Effects on driving behaviour, workload and comfort
2001 (English)Report (Other (popular science, discussion, etc.))
Abstract [sv]

In contraflow work zone areas, traffic of one carriageway is guided to the

other carriageway with decreased lane width, either partially (3-1 type work

zone) or completely (4-0 type work zone). According to the Dutch guidelines

for work zone areas, a contraflow system is only allowed to have a maximum

length of 4 km, since otherwise it is supposed that road users experience too

high a workload. The present study investigated the effects of long

contraflow systems (up to 12 km) on lateral position, longitudinal control,

speed, road marking crossings, steering performance, workload and subjective

evaluation. The study included a driving simulator study, video observations

of traffic behaviour at contraflow systems, and a study with an instrumented

vehicle at prolonged contraflow-systems. The driving simulator study

investigated the effect of type of contraflow system, lane width and length

of the contraflow system on driving behaviour, workload and subjective

safety. Video images of traffic behaviour at transitions from a standard

motorway to both contraflow systems were analysed and effects of both

contraflow systems on real driving behaviour and physiological measures were

studied by means of driving in an instrumented vehicle in actual traffic. The

three separate studies showed to be complementary. The driving simulator

study (with simulated cars and heavy vehicles surrounding the subject) showed

a clear difference in driving behaviour and subjective safety between 3-1 and

4-0 type work zones. Lane width also turned out to affect driving

performance. The study with the instrumented vehicle showed effects on

driving behaviour and physical workload, with the effect of length being in

correspondence with the results found in the driving simulator study. The

video images showed high turbulence in the traffic flow in front of the work

zones due to a fairly high amount of lane changes. This may be explained by

drivers trying to avoid the traffic lane where heavy traffic is allowed.

Based on the results of the three studies together, safety recommendations

were proposed for designing safe contraflow systems, with attention paid to

lane width, type of work zone system and length of the work zone.

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, Construction site, Traffic lane, Change, Length, Impact study, Test, Simulator, In situ, Observation, Video camera, Contraflow traffic, Behaviour, Driver, Mental load, Attitude, Safety, Width, Physiology
Research subject
Road: Traffic safety and accidents, Road: Road user behaviour; Road: Traffic safety and accidents, Road: Geometric design and traffic safety
Identifiers
URN: urn:nbn:se:vti:diva-4945OAI: oai:DiVA.org:vti-4945DiVA: diva2:673774
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