Institut français des sciences et technologies des transports, de l’aménagement et des réseaux www.ifsttar.fr Institut français des sciences et technologies.

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Transcription de la présentation:

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Speed limiter, a tool to reduce speeding? Corinne BRUSQUE Myriam HUGOT Arnaud BONNARD

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Speed, a road safety issue a main cause of road crash a major contributory factor in 30% of fatal crashes [TRB, 1998] a direct influence on accident severity Implementation of safety interventions to reduce speeding behaviour

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Speed regulation systems Speed alertSpeed limiter Intelligent Speed Adaptation Cruise control Adaptative cruise control

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Speed limiter A in-built system that supports the driver in not exceeding a pre-selected speed by limiting the throttle 4 controls 1 select CC, SL or no system 2 Store the speed, decrease the selected speed. 3 Disengage and engage the system 4 Store the speed, increase the selected speed.

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Interaction project Who are the IVT users and non users? Where, when, how and why drivers use IVT? What are the real effects of IVT on driving?

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Interaction project Where and how drivers use SL?

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Equipment in-built Cruise Control (CC)in-built Speed Limiter (SL)nomadic navigation deviceBluetooth hands-free car kit A small-scale Naturalistic Driving Study (1/3) 5 instrumented vehicles Peugeot 308 Peugeot 207 SWRenault Clio Estate Min. 4 weeks

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux A small-scale Naturalistic Driving Study (2/3) Drive as you normally would, both regarding your journeys and your driving style. Use the equipment according to your habits. N=16 drivers 10 6 Age: years Participants valid driving license >10 years normally use a speed regulation system >50% of trips drive >2000km per month use mobile phone while driving (no specified frequency)

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux A small-scale Naturalistic Driving Study (3/3)

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux SL use rate according to road types 8 SL users among the 16 drivers 51 hours of SL use SL use rate = 17 % of time driven with SL on No effect of road types on SL use rate

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux SL users strategies 8 drivers users strategies

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Mainly highway SL users SL speed distribution SL speed on highway is in average 5 km/h above the legal speed limit No change of the SL speed when they get away from highway Driving time by road type Driver 416

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Mainly rural road SL users SL speed distribution The SL speed fits the legal speed limit of rural roads No change of the SL speed when they get away from rural to urban roads Driving time by road type Driver 402

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Mixed road SL users SL speed distribution Change of the SL speed according to the legal speed limit Driving time by road type Driver 412

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux The different SL states (1/2) SL off SL on 90 km/h130 km/h90 km/h50 km/h SL offSL usefullSL useless Legal speed limit SL speed 2 SL states 3 SL states

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux The different SL states (2/2)

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Conclusion A pilot study due to the size of the sample SL speed selected above the legal speed limit In order to avoid speed fines Preferential context of SL use Highways Rural roads Why Drivers aware that the frequency of speed control differ according to the roads Unaware that speeding is also a issue in urban area mainly for VRU

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux Thank for your attention Corinne BRUSQUE, PhD IFSTTAR - LESCOT 25 avenue François Mitterrand Bron Cedex France