Innovative policies for implementing intelligent speed adaptation on urban roads (original) (raw)
Related papers
2005
Road safety is high on the agenda of transport policymakers. When looking for policies to improve road safety, more focus should be placed on urban roads, since the accident risk is greater for urban roads than for other types of roads. One of the major contributing factors to urban road accidents is speed. Intelligent Speed Adaptation (ISA) uses an in-vehicle device to monitor local speed restrictions and support the driver in adjusting his driving speed to the posted maximum speed. The technological feasibility and potential safety impacts of ISA have been documented. Policymakers and others are now exploring possibilities for implementing ISA on a large scale. Policymaking, however, is restrained by uncertainties about the real-world impacts of ISA implementation. Concerns about acceptance among drivers, technological failures, unexpected costs, etc., are causing delays in ISA implementation. In this paper, we describe an innovative policy analysis approach that can take account ...
Driving with intelligent speed adaptation: Final results of the Belgian ISA-trial
Transportation Research Part A-policy and Practice, 2007
In October 2002 the first ISA-trial in Belgium was started in Ghent. 34 cars and 3 buses were equipped with the "active accelerator pedal". In this system a resistance in the accelerator is activated when the driver attempts to exceed the speed limit. If necessary, the driver can overrule the system. The main research goals of the trial in Ghent were to evaluate the effects of ISA on speed-change, traffic safety, drivers' attitude, behaviour and drivers' acceptance. To study these effects of the ISA-system both surveys and logged speed data were analyzed. In the surveys drivers noticed that the pedal assisted them well in upholding the speed limits and that the system increased driving comfort. Most important drawbacks were technical issues.
Road Safety Benefits of Intelligent Speed Adaptation for Australia
2011
Intelligent Speed Adaptation (ISA) refers to in-vehicle technology systems which assist drivers to keep to or below the speed limit. In 2009-2010 the NSW Centre for Road Safety conducted the NSW ISA Trial which was the largest road safety technology trial ever conducted in Australia. Over 110 light vehicles from private and company fleets were fitted with an Advisory ISA device and a speed data recorder. Over 7.6 million vehicle speed data records were collected and analysed to measure changes in drivers‟ speed compliance. The Advisory ISA system reduced speeding in 89 per cent of trial vehicles. The median probability of speeding was also reduced by almost 30 per cent. Initial modelling suggested that if all vehicles in NSW were equipped with the Advisory ISA system trialled, road deaths would be reduced by 8.4 per cent and the number of people injured would be reduced by 5.9 per cent. Results of the trial demonstrated that Advisory ISA technology has the potential to realise subst...
Accident Analysis & Prevention, 2012
The UK Intelligent Speed Adaptation (ISA) project produced a rich database with high-resolution data on driver behaviour covering a comprehensive range of road environment. The field trials provided vital information on driver behaviour in the presence of ISA. The purpose of this paper is to exploit the information gathered in the field trials to predict the impacts of various forms of ISA and to assess whether ISA is viable in terms of benefit-to-cost ratio. ISA is predicted to save up to 33% of accidents on urban roads, and to reduce CO 2 emissions by up to 5.8% on 70 mph roads. In order to investigate the long-term impacts of ISA, two hypothetical deployment scenarios were envisaged covering a 60-year appraisal period. The results indicate that ISA could deliver a very healthy benefitto-cost ratio, ranging from 3.4 to 7.4, depending on the deployment scenarios. Under both deployment scenarios, ISA has recovered its implementation costs in less than 15 years. It can be concluded that implementation of ISA is clearly justified from a social cost and benefit perspective. Of the two deployment scenarios, the Market Driven one is substantially outperformed by the Authority Driven one. The benefits of ISA on fuel saving and emission reduction are real but not substantial, in comparison with the benefits on accident reduction; up to 98% of benefits are attributable to accident savings. Indeed, ISA is predicted to lead to a savings of 30% in fatal crashes and 25% in serious crashes over the 60-year period modelled.
Adaptive policy approach to implementing intelligent speed adaptation
Iet Intelligent Transport Systems, 2007
Intelligent speed adaptation (ISA) has the potential to improve road traffic safety significantly. Large-scale implementation of ISA, however, is hampered by large uncertainties, such as the level of compliance (LC), reliability of the technology, unexpected costs and so on. We suggest an adaptive policymaking approach for implementing ISA. We propose five steps: (1) specify the policy problem, (2) assemble a basic policy, (3) specify the rest of the policy, (4) learn from real world experience with the basic policy and (5) adjust the implemented policy. We demonstrate, as a proof of concept, how to design a basic ISA policy and how to gain knowledge over time about the behaviour of the system in order to resolve some of the uncertainties and improve the policy. By monitoring the percentage of speeding drivers to detect changes in the LC, the policy can be adapted to unfolding events. Hence, by using the adaptive approach, policymakers can proceed with implementing ISA despite the large uncertainties.
Intelligent Speed Adaptation: Slow speed, Slow Implementation?
Every day people in Europe and other parts of the world are confronted with the grim reality of losing loved ones due to traffic accidents. Research shows that one out of three fatal accidents is related to an inappropriate speed. A possible measure for reducing speeding is implementing Intelligent Speed Adaptation (ISA), which supports or enforces a driver to maintain the appropriate speed limit. ISA has been tested around the world and these field tests show that, ISA has the potential to significantly reduce fatal accidents. However, implementing effective ISA seems far away. In this paper we try to explain which factors hamper the implementation of ISA and what needs to be achieved to speed up implementation. Finally we conclude that in order to speed up ISA implementation the government should play the role of change agent, actively promoting ISA creating opportunities for potential adopters to try and observe the use of ISA.
Intelligent speed adaptation: from trial support to public support
Intelligent Speed Adaptation (ISA) is a beneficial Intelligent Transport System (ITS) to increase road safety. In 2002, thirty-four cars and three buses were equipped with the "active accelerator pedal." The results showed that the pedal assisted them well in upholding the speed limits and that the system increased driving comfort and data analysis showed a reduction in the amount of speeding. Besides the research on the effects, the trial was used to gain more support of the general public, decision and opinion makers. Nowadays the focus is shifted to define the acceptability by the public to getter a better implementation. A general research framework consisting the social and cultural factors and the device related characteristics that influence acceptability is constructed.