Opportunity is the operative.
At the end of April, Denis McCabe and I were on our way to the Basel Airport on the airport bus (image omitted). On the way, we spotted an over bridge on the double-track line that connects Basel with France.
Arriving at the airport, we concluded that we were too early to check in for our flight, so rather than waste time milling around the airport, we doubled back to the bridge, a mere 10 minutes away.
Among the photos I made in the interval at the bridge was this trailing view of an SNCF freight heading to France from Switzerland.