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Speed Regulation by in-car active Accelerator pedal – effects on speed and speed distribution

Hjälmdahl, Magnus LU ; Almqvist, Sverker LU and Varhelyi, Andras LU (2002) In IATSS Research p.60-66
Abstract
The effects on speeds and speed distribution were studied in a large scale field trial with an in car system for speed adaptation in the city of Lund, Sweden. In the trial 290 vehicles were equipped with an "active accelerator pedal" and data logger for a period of 3-11 months. Data was logged in each test vehicle during the whole trial and was analyzed for 3 one-month periods: Before activating the system, after short time use and after long time use. The results showed significant reductions in the speed level. Speeds on stretches decreased statistically significantly (p<0.05) at 60 out of 69 observed sections. The effects were largest on arterial roads, at mid-block sections, where the prevailing traffic conditions and street design... (More)
The effects on speeds and speed distribution were studied in a large scale field trial with an in car system for speed adaptation in the city of Lund, Sweden. In the trial 290 vehicles were equipped with an "active accelerator pedal" and data logger for a period of 3-11 months. Data was logged in each test vehicle during the whole trial and was analyzed for 3 one-month periods: Before activating the system, after short time use and after long time use. The results showed significant reductions in the speed level. Speeds on stretches decreased statistically significantly (p<0.05) at 60 out of 69 observed sections. The effects were largest on arterial roads, at mid-block sections, where the prevailing traffic conditions and street design allows higher speeds. The standard deviation decreased on all arterial roads, mainly due to the decrease in speed of the fastest vehicles but there is also an effect from an increase in speed of the slowest vehicles. On streets with mixed traffic no differences in speed or speed distribution could be shown. This is most likely due to the fact that speeds were already controlled by the prevailing traffic conditions and they already were so low that the system never had to interfere. Further research is needed in order to investigate possible behavioral adaptation effects when the system is active as well as inactive and how driver behavior would be influenced in a situation where a large part of the vehicle fleet equipped with an active accelerator pedal. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Speed adaptation, Active Accelerator Pedal (AAP), Speed, Speed variance, Traffic safety
in
IATSS Research
pages
60 - 66
publisher
Elsevier
ISSN
0386-1112
language
English
LU publication?
yes
id
5c990a87-9079-43ec-9c7b-5ac291e910e8 (old id 768989)
date added to LUP
2007-12-28 21:42:18
date last changed
2016-11-17 15:39:48
@misc{5c990a87-9079-43ec-9c7b-5ac291e910e8,
  abstract     = {The effects on speeds and speed distribution were studied in a large scale field trial with an in car system for speed adaptation in the city of Lund, Sweden. In the trial 290 vehicles were equipped with an "active accelerator pedal" and data logger for a period of 3-11 months. Data was logged in each test vehicle during the whole trial and was analyzed for 3 one-month periods: Before activating the system, after short time use and after long time use. The results showed significant reductions in the speed level. Speeds on stretches decreased statistically significantly (p&lt;0.05) at 60 out of 69 observed sections. The effects were largest on arterial roads, at mid-block sections, where the prevailing traffic conditions and street design allows higher speeds. The standard deviation decreased on all arterial roads, mainly due to the decrease in speed of the fastest vehicles but there is also an effect from an increase in speed of the slowest vehicles. On streets with mixed traffic no differences in speed or speed distribution could be shown. This is most likely due to the fact that speeds were already controlled by the prevailing traffic conditions and they already were so low that the system never had to interfere. Further research is needed in order to investigate possible behavioral adaptation effects when the system is active as well as inactive and how driver behavior would be influenced in a situation where a large part of the vehicle fleet equipped with an active accelerator pedal.},
  author       = {Hjälmdahl, Magnus and Almqvist, Sverker and Varhelyi, Andras},
  issn         = {0386-1112},
  keyword      = {Speed adaptation,Active Accelerator Pedal (AAP),Speed,Speed variance,Traffic safety},
  language     = {eng},
  pages        = {60--66},
  publisher    = {ARRAY(0xa9d9678)},
  series       = {IATSS Research},
  title        = {Speed Regulation by in-car active Accelerator pedal – effects on speed and speed distribution},
  year         = {2002},
}