In 2018, UIC published a White Paper on railway aerodynamics produced by the Railway System Department’s TTI Sector (https://www.shop-etf.com/fr/train-track-interaction-sector-aerodynamics). This field of study has been driven largely by the increasing speeds of high-speed passenger trains. However, existing and new lines are still being designed for the use of mixed traffic at conventional train speeds – including freight services – driven by local demand and modal shift from road to rail. The White Paper examined the topic of railway aerodynamics, reviewing the current status, identifying problems and knowledge gaps and proposing areas of research.
One problem identified relates to the assessment of the safety of railway vehicles with maximum speeds greater than 140 km/h and less than 250 km/h in crosswinds. The LOC & PAS TSI does not provide limit values to assess vehicles, and the INF TSI does not prescribe methods or guidance for infrastructure managers to assess their lines for crosswind exposure and the risk of train accidents.
The SAFIRST project was launched in March 2019 to research these issues and to develop guidance for infrastructure managers by:
- assessing the crosswind safety of rolling stock,
- assessing wind exposure along railway lines, and
- demonstrating the crosswind safety of railway lines with appropriate wind mitigation.
SAFIRST Work Package 1 covers the first objective above. The WP1 technical report deals with calculation of the characteristic wind curves (CWCs) of the most wind-susceptible vehicles in trains with maximum speeds between 140 km/h and 250 km/h. The report can be downloaded from the UIC ETF Shop at https://www.shop-etf.com/fr/safirst-vehicle-assessment-technical-report