Risk analysis: hazardous goods and freight train restrictions in the Danish fixed links

The Danish Transport Authority and operators of the Danish fixed links (Øresund, Storebælt and Femern) have requested DTU to assess the risk of freight trains, possibly carrying hazardous goods (i.e. RID-classified goods), using the fixed links in close distance to passenger trains. At present, restrictions are in place, which prohibit freight trains and passenger trains to be in tunnel tubes simultaneously, which leads to a decrease of the transport capacity.
The risk analysis focusses on the risk to passengers in passenger trains due to freight trains being in the tunnels simultaneously, and will not address the risk to disruption of the transport due to damage to the infrastructure, because this is already an accepted risk for freight trains passing the fixed links.
The purpose of the risk assessment is to provide insights into the changes in risk when restrictions for simultaneous presence of freight trains and passenger trains in the same tunnel tube are changed (and where several options are possible) and what safety measures might be beneficial for reducing risks ALARP (As Low As Reasonably Practicable) when restrictions are relaxed.