factors influencing drivers’ speeding behaviour henriette wallén warner @
DESCRIPTION
FACTORS INFLUENCING DRIVERS’ SPEEDING BEHAVIOUR Henriette Wallén Warner @. ”This must never happen again!” Coroner, 1896. Speed. The power model (Nilsson, 2000) U-shaped relationship (Solomon, 1964). Risk Perception. ISA - Intelligent Speed Adaptation. - PowerPoint PPT PresentationTRANSCRIPT
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FACTORS INFLUENCINGFACTORS INFLUENCINGDRIVERS’ SPEEDING DRIVERS’ SPEEDING
BEHAVIOURBEHAVIOURHenriette Wallén WarnerHenriette Wallén Warner
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”This must never happen again!” Coroner, 1896
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SpeedSpeed
The power modelThe power model(Nilsson, 2000) (Nilsson, 2000)
U-shaped relationshipU-shaped relationship(Solomon, 1964)(Solomon, 1964)
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Risk Perception
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ISA- Intelligent Speed Adaptation
Technical systems that are intended to help drivers keep the right speed
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Different typs of ISA
• informative• warning• intervening• overtaking
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ISA- in Sweden
Swedish National Road Administration1999-20024500 vehicles4 cities
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Borlänge- 400 vehicles- 700 km of roads
Informed Warned Logged
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Theory of Planned BehaviourTheory of Planned Behaviour(TPB)(TPB)
BehaviourBehaviourNormativa Normativa BeliefsBeliefs
Subjective Subjective NormNorm IntentionIntention
Perceived Perceived Behavioural Behavioural
ControlControl
AttitudeAttitude
ControlControlBeliefsBeliefs
BehaviouralBehaviouralBeliefsBeliefs
(Ajzen, 1991)(Ajzen, 1991)
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ResultsResults
AttitudeAttitude
SubjectiveSubjectiveNormNorm
Self-ReportedSelf-ReportedBehaviourBehaviour
ObservedObservedBehaviourBehaviour
LISRELLISREL
.22.22
.27.27
.37.37
RR2 2 =.39=.39 RR2 2 =.28=.28
-.29-.29
-.34-.34
-.39-.39
.57.57 Perceived Perceived
Behavioural Behavioural ControlControl
.23.23
χ2 [df = 2, N = 112 ] = 2.01; p = .37; RMSEA = .008χ2 [df = 2, N = 112 ] = 2.01; p = .37; RMSEA = .008
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Conclusion
The study demonstrated that the The study demonstrated that the TPB, with some modifications, TPB, with some modifications, can be used to predict and can be used to predict and understand drivers’ intention and understand drivers’ intention and everyday speeding behavioureveryday speeding behaviour
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ResultsResults- obstructing- obstructing
(N=145-161)(N=145-161)
UrbanUrbanFast traffic rythmFast traffic rythmDrivers close behindDrivers close behindBeing in a hurryBeing in a hurry
RuralRuralFast traffic rythmFast traffic rythmDrivers close behindDrivers close behindGood roadsGood roads
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ResultsResults- facilitating- facilitating
(N=145-161)(N=145-161)
UrbanUrbanIncreased accident riskIncreased accident riskPeople along the roadsPeople along the roadsSpeed reducing measures (humps)Speed reducing measures (humps)
RuralRuralSerious consequencesSerious consequencesPeople living along the roadsPeople living along the roadsLarge penaltiesLarge penalties
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ResultsResults-intentionintention(N=145-161)(N=145-161)
UrbanUrbanShorter travel timesShorter travel timesIncreased risk of losing driving licenceIncreased risk of losing driving licencePeople along the roadsPeople along the roadsPassing a speed signPassing a speed sign
RuralRuralShorter travel timesShorter travel timesEasier to over takeEasier to over takeContribute to a stressful traffic environmentContribute to a stressful traffic environmentRelatives and friendsRelatives and friendsPeople living along the roadsPeople living along the roadsPassing a speed signPassing a speed signBeing in a hurryBeing in a hurry
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Countermeasures
• information/education• enforcement (negative or positive)
• physical measures (road or invehicle)
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Speeding on streets with 50 km/h speed limit
0
5
10
15
20
25
30 BeforeAfter20012003
%%
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ConclusionsConclusions
Initially the informing ISA speed-warning Initially the informing ISA speed-warning device reduces the amount of time device reduces the amount of time drivers spend speedingdrivers spend speeding
- but this effect decreases with time- but this effect decreases with time
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Driving ExperienceFeeling controlled ***Safety in trafficAttention of pedestriansTravel time in urban areas *Irritation in traffic **Stress in traffic
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Driving BehaviourFeeling of being in the wayLooking at the speedometer ***Need for paying attentionFeeling of frustrationFeeling of time pressureNeed for effortNeed for accelerating/brakingBeing a better driver **
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Acceptance of ISA(van der Laan, 1997)
Usefulness
Satisfaction
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Where is ISA most desirable?at schools and day nurseries with 30 km/hat schools and day nurseries with 50 km/h housing estates with 30 km/hin urban areas with 30 km/hin housing estates with 50 km/h
in rural areas with 70 km/hin urban areas during night timein rural areas with 90 km/hin rural areas with 110 km/h on highways with 110 km/h
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For Whom is ISA most desirable?drivers who have repeatedlybeen convicted for speeding
drivers who recently received their driving licence
young private drivers
commercial drivers transporting children to school
bus drivers
taxi drivers
truck drivers
all commercial drivers
elderly private drivers
all private car drivers
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Speed Reducing Measure
Urban areas *Rural areas
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Global Perspective(WHO, 2004)
Globally2004: 1.2 million killedVulnerable road users (especially elderly, children and disabled) in low- and middle-income countries shoulder a large proportion
High income countries27% decrease of road traffic deaths between 2004 and 2020
Low and middle income countries83% increase of road traffic deaths between 2004 and 2020
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Sweden (n=37) -25 : 3
25-50 : 2250- : 12
31 men; 6 women
Nigeria (n=28) -25 : 125-50 : 2150- : 428 men; 0 women
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SwedenExtensive trainingNew taxis (00-06; M=05)
Nigeria25% lacks trainingOlder taxis (84-04; M=93)
Drivers and TaxisDrivers and Taxis
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Index
Swedenmean (SD)
Nigeriamean (SD)
t-value
Hindered: urban areas 1.19(0.32)
1.15(0.19)
ns
Hindered: rural areas 1.55(0.33)
1.49(0.34)
ns
Driving is:1=safe; 2=dangerous
1.32(0.32)
1.98(0.07)
11.04
Traffic environmentTraffic environment
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SwedenSpeedingAlcohol or drugs Reckless driving
NigeriaBad roads Reckless drivingSpeeding
AccidentsAccidents
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Sweden Nigeria22% 83%
FateFate
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Index
Swedenmean (SD)
Nigeriamean (SD)
t-value
A(1=not acceptable; 5=totally acceptable)
2.41(1.28)
1.14(0.45)
-5.57
SN(1=not acceptable; 5=totally acceptable)
2.06(0.98)
1.08(0.27)
-5.68
PBC(Comply: 1=very hard; 5=very easy)
- 4.92(0.27)
-
Intention(1=never/hardly ever; 5=all the time)
2.14(1.13)
1.71(0.86)
n.s.
SpeedingSpeeding
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Index
Swedenmean (SD)
Nigeriamean (SD)
t-value
A(1=not acceptable; 5=totally acceptable)
1.14(0.48)
1.00(0.00)
n.s.
SN(1=not acceptable; 5=totally acceptable)
1.00(0.00)
1.04(0.19)
n.s
PBC(Comply: 1=very hard; 5=very easy)
- 5.00(0.00)
-
Intention(1=never/hardly ever; 5=all the time)
1.00(0.00)
1.13(0.45)
n.s.
Drinking and drivingDrinking and driving
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Index
Swedenmean (SD)
Nigeriamean (SD)
t-value
A(1=not acceptable; 5=totally acceptable)
1.59(1.09)
1.25(0.58)
n.s.
SN(1=not acceptable; 5=totally acceptable)
1.36(0.64)
1.27(0.60)
n.s
PBC(Comply: 1=very hard; 5=very easy)
- 4.81(0.49)
-
Intention(1=never/hardly ever; 5=all the time)
1.41(0.90)
1.58(0.88)
n.s.
Not using seat-beltsNot using seat-belts
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Index
Swedenmean (SD)
Nigeriamean (SD)
t-value
A(1=not acceptable; 5=totally acceptable)
1.65(0.68)
1.00(0.00)
-5.84
SN(1=not acceptable; 5=totally acceptable)
1.51(0.74)
1.04(0.20)
-3.63
PBC(Comply: 1=very hard; 5=very easy)
- 5.00(0.00)
-
Intention(1=never/hardly ever; 5=all the time)
1.22(0.48)
1.17(0.48)
n.s.
Driving a car with bad tyresDriving a car with bad tyres
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Conclusion
The focus of traffic safety research has to shift from the road users in high-income countries to the road users in low- and middle-income countries
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FRÅGOR??Henriette Wallén WarnerHenriette Wallén Warner
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