Evaluation of Raised Safety Platforms (RSP) On-Road Safety Performance

A Raised Safety Platform (RSP) is a relatively new physical road safety intervention at major intersections. They aim to enhance road user safety by reducing vehicle speeds at intersections using an acute vertical deflection to the vehicle path. This study measured the change in speed at selected high-volume intersections treated with an RSP. It was a 12-month study based on a controlled before-and-after-treatment design, with speed and other measures assessed at six treated and five control intersections. Statistically significant and meaningful reductions in speeds were observed given the treatment and adjusted for the control group. A 15.6% reduction in the central tendency of speed was found overall. The odds of a vehicle exceeding nominal Safe System speeds of 30 km/h, 40 km/h, and 50 km/h also reduced markedly, with greater reductions observed at the higher speed thresholds (46%, 69%, and 80%, respectively). The change in speed corresponded to an estimated aggregate-level injurious crash-reduction benefit of around 26% and a reduction in the likelihood of a serious injury given a crash of between 38% to 57% depending on the crash type. It was concluded that RSP is an effective Safe System treatment to reduce speeds at major intersections to levels similar that at roundabouts. The results suggest that well designed RSPs at signalised intersections are an effective and sustainable Safe System treatment.

Framework to Improve the Attitudes of Construction Workers towards Safety Helmets

Construction workers in various studies across the globe have indicated that there is some discomfort with the use of safety helmets, and that some workers do not use safety helmets as required, resulting in a compromise to their health and safety protection. This study investigates the processes involved in the selection and procurement of safety helmets for construction workers and assesses these efforts by interrogating the discomforts experienced by users in spite of these selection considerations. The study focuses on safety helmets used by construction workers, as this is a common form of personal protective equipment (PPE) usually given out on construction sites to prevent head injuries, which are among the severest forms of occupational accidents in the industry. Primary data were obtained through a questionnaire survey conducted with construction firms operating in Ghana and semi-structured interviews with construction workers. The findings from the study indicate that in spite of the purported considerations by construction firms in the selection and procurement of PPE, construction workers continually experience several discomforts with the use of safety helmets. The study proposes a Behaviour-Based Safety Intervention Framework to guide the selection and procurement of user-friendly PPE that improves the user experience of safety helmets.

Theorizing Factors Mediating With the Implementation of a Patient Feedback on Safety Intervention Implemented in the Primary Care Setting

Developing safety interventions using patient feedback is valuable for creating safer systems of health care. A qualitative process evaluation of a patient feedback on safety intervention was undertaken in six primary care practices. The purpose was to theorize factors mediating with the implementation of the intervention using existing theories. The intervention required practices to obtain patient feedback on safety using a validated tool and respond using quality improvement methods. Multiple methods of qualitative data collection were used, including interviews and overt observation. Abductive reasoning informed the iterative process of analysis that examined theories relevant to the intervention and setting. A theoretical framework was developed, which encompassed mediating factors grouped under three concepts: practice readiness, utilization of problem-solving skills, and agency. Theorizing mediating factors was necessary to understand the complexities of primary care practices, and to identify the essential components for implementation of the intervention on a larger scale.

Translating risk to preventable burden by estimating numbers of bicycling injuries preventable by separated infrastructure on a Toronto, Ontario corridor

Objectives: Bicycling is a form of active transportation with a number of health benefits but carries a high risk of injury compared to other transportation modes. Safety intervention evaluations often produce results in the form of ratios, which can be difficult to communicate to policy-makers. The primary objective of this study was to estimate the number of bicycling injuries on an urban corridor preventable by separated bicycling infrastructure. Methods: Stakeholders identified a key corridor with multiple segments having bicycling infrastructure but most of the corridor lacking similar infrastructure. We counted bicyclist volume along this route and used secondary data to supplement counts missing due to COVID-19. We used two reference studies including local bicycling population to estimate benefit of separated bicycling infrastructure and applied this to a city-wide estimate of baseline risk of injury per kilometre bicycled, which used a combination of secondary data sources including police, health care and travel survey data. Finally, we adjusted baseline risk to account for increased bicyclist volume during and following the COVID-19 pandemic. Results: We estimated installation of fully separated cycle tracks along one Toronto corridor would prevent approximately 152.9 injuries and 0.9 fatalities over a 10-year period. Discussion: Our results underscore the benefits of separated bicycling infrastructure. We identify several caveats for our results, including the limitations of studies used to estimate relative risk of infrastructure. Our method could be adapted for use in other cities or along other corridors. Finally, we discuss the role of preventable burden estimates as a knowledge translation tool.