Please see access=*?uselang=en#Possible_tagging_mistakes against the use of access=bus

What was your motivation to change the tracks between Bonifatiuskirche and Käfertal Bahnhof from railway=narrow_gauge to railway=tram? Having this inconsistent between both tracks of the same operational line doesn't make sense. This is also inconsistent with all other ESBO lines in the RNV network, which are also tagged as narrow gauge