South of Frankfurt 12 km of autobahn were a testing track for an e-highway, a modern version of trolley trucks intended for hybrid trucks. Apparently the power lines can be called catenary.
Expensive and gone
pictures imperfect blog
imperfect pictures
pictures imperfect blog 
Power lines indeed hang in a catenary Elke.
Thanks for joining in 😀
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I’d never heard the word before and the German translations were not all that helpful. Maybe for engineers, not for me.
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I enjoy having words to make bloggers think. Once you know the meaning most times a photo or words come easily I hope 😀
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