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- Draskóczy, Magdolna, et al.
(författare)
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The effects of active accelerator pedal in cars – Results from a large scale trial with intelligent speed adaptation.
- 2002
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Konferensbidrag (refereegranskat)abstract
- Within the framework of the Swedish national trial with Intelligent Speed Adaptation (ISA) in urban areas, the effects of large scale use of “active accelerator” were evaluated. 284 cars were equipped with the system for a period of 5-11 months in the city of Lund. The driving data of all equipped vehicles were logged with regard to time and speed, both before and after activating the system. Driver behaviour were studied with the help of an instrumented vehicle. Possible system effects, such as speeds, interactions with other road-users and driving against red were studied in the field. Possible changes in driver attitudes and acceptance were studied by interviews. The results revealed that test drivers’ compliance with the speed limits increased and practically no negative compensatory effects could be found.
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| 5. |
- Hydén, Christer, et al.
(författare)
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The effects on safety, time consumption and environment of large scale use of roundabouts in an urban area
- 2000
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Ingår i: Accident Analysis and Prevention. - 1879-2057. ; 32, s. 11-23
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Tidskriftsartikel (refereegranskat)abstract
- An experiment with small roundabouts – as speed reducing measures - was carried out in a Swedish city. The purpose of the study was to test the large scale and long term effects of the roundabouts. The results showed that the roundabouts reduced the speed considerably at the junctions and on links between roundabouts. The lateral displacement the roundabout forces the driver to has a great importance for the speed of approaching cars to a roundabout. The speed-reducing effect is large already at a 2 meter’s deflection. A larger deflection does not result in a larger effect. Conflict studies indicated an overall decrease in accident risk by 44%. Vulnerable road-users’ risk was reduced significantly, while there was no reduction for car occupants. There is a relation between the reduction of approach speed and the reduction of injury accident risk. The time consumption at a time operated signal was reduced heavily by the instalment of a roundabout at a signalised intersection. On average, emissions (CO and NOx) at roundabouts replacing non-signalised junctions increased by between 4 and 6%, while a roundabout replacing a signalised intersection led to a reduction by between 20 and 29%. The noise level was reduced at junctions that were provided with roundabout. Car drivers were less positive to the roundabouts than bicyclists. In the long term, the unchanged roundabouts worked almost as good as they did shortly after the rebuilding. The study showed that details in the design are of decisive importance for road-users’ safety. Special attention has to be paid to the situation of bicyclists. The transition between the cycle path/lane and the junction has to be designed with care - the bicyclists should be integrated with motorised traffic before they enter the roundabout. There should be only one car lane both on the approach, in the circulating area and on the exit. The size of the roundabout shall be as small as possible.
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| 8. |
- Varhelyi, Andras, et al.
(författare)
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A large-scale trial with Intelligent Speed Adaptation in Lund, Sweden.
- 2000
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Ingår i: [Host publication title missing].
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Konferensbidrag (refereegranskat)abstract
- On the decision of the Swedish government, the Swedish National Road Administration (SNRA) has started a large-scale trial with Intelligent Speed Adaptation (ISA) in urban areas. One of the four test sites is the city of Lund. At the Department of Technology and Society, Lund University, research about ISA has been carried out since 1986 and the first field study was carried out in 1993. The ongoing large scale trial is based on experience from previous research on the concept of ISA. The major findings from these trials where that speeds on stretches decreased, car-following behaviour improved and the acceptance of the system increased after using it. In the ongoing trial, technology has made it possible to log all driving data of all equipped vehicles with regard to time, position, rpm and speed, both before and after installation of the speed-limiter. There will also be a focus on driver behaviour and workload. This will be evaluated by using an instrumented vehicle. Also system effects, such as speeds, interactions with other road-users, driving against red, emissions will be investigated.
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| 10. |
- Varhelyi, Andras, et al.
(författare)
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Biltrafik
- 2008
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Ingår i: Trafiken i den hållbara staden. - 9789144053011 ; , s. 315-357
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Bokkapitel (refereegranskat)
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