In Germany, the red-yellow phase is only one second long, for many traffic signal lights. Some use a two-second phase, but not many. In Frankfurt however the majority of signals use two seconds. Some signals have backplates with a white stripe, similar to most of those in Switzerland, but others mainly don't.
Some photos from the Bockenheimer Warte / University of Frankfurt/Main, and Konstablerwache. Some from just around the corner from the Leather/Shoe Museum in Offenbach, just 10 km southeast of Frankfurt am Main. More signal photos to come soon.
Limburg an der Lahn