A video analysis of cyclists crossing tram tracks in the city has identified various risk levels and contributory factors
Analysis: a video study of cyclists crossing tram tracks in the city has identified various risk levels and contributory factors
Single bicycle crashes are particularly underestimated, i.e., cases not involving an impact with another road user. While there are numerous contributory factors associated with single bicycle crashes, recent studies involving hospital data and self-reporting have found that tram tracks are a significant contributory factor in Dublin.
As of 2021, Ireland has embraced a long-term goal to eliminate road traffic deaths and serious injuries by 2050 and Vision Zero now forms the foundation of our Road Safety Strategy. This is a well-established framework for road safety that is based on an ethical philosophy that life and health can never be exchanged for other benefits within society, such as economic growth, transportation efficiency, or technological advancements.
Traffic camera footage To gain a clearer picture of the issue, we turned to traffic camera footage from 9 locations around Dublin city centre during October and November 2021. Our focus was on wet road conditions, a known hazard for cyclists. Along with visual assessments, computer vision techniques were used to extract quantitative measures of cyclists’ velocities and crossing angles from the footage.
Logistic regression modelling was used to establish the relationships between cyclist velocity, crossing angle and crossing success. As expected, we found that the angle at which a cyclist crosses tram tracks is a strong predictor of whether they'll make it across safely. On the other hand, cyclist velocity didn't have a statistically significant effect. The model allows for estimation of the likelihood of crossing success based on the angle at which a cyclist crosses.
The recent draft Dublin City Centre Transport Plan 2023 indicates that we will see a changing cityscape in the coming years. Significant efforts are planned to reduce traffic by 40% and reclaim public space for active and sustainable transport modes. With this, unintended and potentially unforeseeable conflicts are likely to arise.
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