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- Rizzi, Maria C, et al.
(author)
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The potential of different countermeasures to prevent injuries with high risk of health loss among bicyclists in Sweden
- 2020
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In: Traffic Injury Prevention. - : Informa UK Limited. - 1538-9588 .- 1538-957X. ; 21:3, s. 215-221
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Journal article (peer-reviewed)abstract
- Objective: As bicyclists account for the largest share of serious injuries in Sweden, focus to improve safety for bicyclists is needed. While knowledge about fatal bicycle crashes is rather extensive, the number of studies that have investigated non-fatal injuries is still rather limited. The aim of this study was to estimate the potential of different countermeasures to reduce crashes resulting in injuries with high risk of health-loss among cyclists in Sweden. A further aim was to describe the residual—that is, crashes that were not considered to be addressed by the analyzed countermeasures. Methods: A sample of individuals with specific injury diagnoses was drawn from the Swedish national crash database Strada. A survey form was used to collect additional information about the crash and the health-related outcomes. The potential of countermeasures currently included in the Swedish Safety Performance Indicators, as well as of countermeasures that could be described as “existing but not fully implemented” was assessed. The overall potential of all countermeasures assessed was calculated, giving a grand total without double counting. Cases that were considered not to be addressed by any of the countermeasures included (i.e., the residual crashes) were described in more detail. Results: The current Swedish Safety Performance Indicators that relate to safe cycling addressed 22% of crashes. Improved maintenance by deicing and removal of snow from bicycle infrastructure was found to have the highest potential (8%), followed by improved crashworthiness of passenger cars (5%) and safer bicycle crossings (4%). The potential for existing but not fully implemented safety improvements was 56%. The greatest potential was found for Autonomous Emergency Braking with cyclist detection for passenger cars (12%), followed by studded winter tyres for bicycles (12%), and improved maintenance on non-bicycle infrastructure (11%). In total, taking double counting into consideration, all safety improvements could address 64% of all crashes. Among the residual crashes, the majority (69%) were single bicycle crashes of which most were related to wheel locking during braking and losing balance at low speed or stationary. Conclusions: Compared with fatal crashes that involve a majority of bicycle-car crashes, the crashes leading to health-loss are mostly single bicycle crashes. Therefore, innovation and development of additional countermeasures to improve safety for bicyclists should focus on single bicycle crashes.
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| 2. |
- Kullgren, Anders, 1963, et al.
(author)
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Fatalities in value chains—an attempt to classify road traffic crashes in accordance with the United Nations General Assembly resolution 74/299
- 2023
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In: Traffic Safety Research. - 2004-3082. ; 5:Special issue
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Journal article (peer-reviewed)abstract
- Large corporations are today expected or obliged to report on accidental deaths and serious injuries to employed or contracted employed as a part of reporting on sustainability and workplace safety. Data about road crashes are part of such events and are therefore, but not separately, collected and presented. In Europe, 40% to 60% of all work-related accidents resulting in death has been reported to be road traffic accidents. In 2020, the Stockholm Declaration urged all corporations to report on their safety footprint including their entire value chain. The aims of the present study were to use a new definition of safety footprint and to quantify those killed as employed and at work, and those killed in a crash where the other part was at work, as so called third parties, to transports for duty with employed drivers. The Swedish Transport Administration (STA) in-depth database of fatal crashes was used, that covers all fatalities classified as road traffic related and consists of information from the police, medical journals, autopsy reports, accident analyses performed by STA, and witness statements. All fatalities excluding suicides or those caused by sickness occurring during year 2019 were investigated (n = 214). 11% (23/214) of the fatalities occurred when the killed person was at work and 16 while commuting. 37% of the fatal accidents occurred when the killed road user or the other part was at work. In total, almost half of the fatalities in the road transport system were related to work in some way when including both the fatally injured and their collision partners. A larger proportion of non-privately owned and procured vehicles was found for the vehicles of the collision partners compared to the vehicles of the fatally injured. In approximately one third of the fatal accidents a procurement of a transport service was involved. The Swedish Work Environment Authority (SWEA) identified 10 of the 23 fatalities at work investigated and none of these accidents was found to be investigated by the police as a crime related to the work environment. In conclusion, almost half of the fatalities in the road transport system in 2019 were related to work in some way, either the fatally injured or their collision partners were at work or while commuting. When including the third-party casualties, the problem becomes much bigger and more complex. In Sweden fatalities related to work are under reported, as the SWEA does not receive basic data. Efforts are needed to improve reporting of work-related road fatalities. It was found that the police did not investigate road traffic fatalities as death at workplace. It is crucial that the police start to follow the intention of regulations linked to workplace safety. If not, the possibility to collect relevant data for organizations to report on their safety footprint is limited. It is complicated to collect, classify and analyse value chain fatal crash information, mainly due to that the police do not investigate fatal road crashes as possibly work-related events. It is recommended that organizations manage their own data collection if they wish to report on their safety footprint data.
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| 3. |
- Rizzi, Matteo, 1979, et al.
(author)
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PROPOSED SPEED LIMITS FOR THE 2030 MOTOR VEHICLE
- 2023
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In: 27th ESV Conference Proceedings.
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Conference paper (peer-reviewed)abstract
- Vision Zero builds on the aspiration to keep kinetic energy below human tolerance to prevent fatalities and serious injuries. In this work, a Swedish expert group within the SAFER arena estimated the maximum safe speed limits for the 2030 motor vehicle based on the boundary conditions of vehicles, road infrastructure and human crash tolerance to achieve close to zero road fatalities and serious injuries. The present work was based on expert consensus, rather than a retrospective quantitative analysis of crash data. Different load cases were discussed separately, with the involvement of a passenger car being the common denominator. The passenger car and its collision partner were assumed to be of model year 2030, thus reflecting the base safety level of the Swedish car fleet by approximately 2050. The boundary conditions were set based on pre-crash autonomous braking ability and the maximum acceptable impact speeds that would result in a very low risk of death or serious injury among the car occupants and the car’s collision partner. In the case of car to pedestrian impacts, the acceptable impact speed was set to zero, as any impact with pedestrians can lead to serious injuries as a result of ground impacts. It was expected that the responsibility to comply with speed limits will move from the driver to the car itself, and that travel speeds will be autonomously reduced when low road friction, sight obstructions, and other challenges in the traffic environment are detected. This function was expected to be non-overridable. Lateral control was also expected to be further enhanced with lane support technologies, although it was assumed that it will be still possible to override such technologies. Over time, increased performance of vehicle safety technologies will likely be able to prevent an increasingly large proportion of crashes in all load cases. However, in line with Vision Zero design principles, human crash tolerance will always be the ultimate boundary condition to guarantee a safe outcome in a crash. As a result, the recommended maximum travel speeds in the road transport system containing motor vehicles only of model year 2030 and beyond are: Rizzi 1 5-7 km/h in pedestrian priority areas, 40 km/h in mixed traffic urban areas, if there are no obstructed sensor sightlines, e.g. due to parked vehicles along the sidewalk, 50 to 80 km/h on roads without mid- and roadside barriers, 100+ km/h on roads with continuous mid- and roadside barriers, 40 to 60 km/h in intersections, depending on vehicle mass differences. The results from this work can be used to inform the development and amendment of transport planning guidelines when moving away from the economical paradigm into Safe System boundary conditions in the setting of speed limits.
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