I have some suggestions:

The "Bundesstrasse" got props like the normal road (lamp posts, hydrants, info panels, sewage covers etc.) but with speed limit 100 and no zoning. There are no visible sidewalks but border stones.
In the mod "Some Roads" is the "Rural Road" without sidewalks, no border stones, no lap posts, no props at all, but with default speed limit and zoning.
I would like to see a "Bundesstrasse" like the "Rural Road", but without zoning, speed limit 100 and other props. Is that possible?

How about props like signs as the blue "Autobahn" signs at vanilla highways, but for the "Bundesstrasse" like the yellow one as shown here: http://www.sicherestrassen.de/VKZKatalog/Kat401.htm
No lamps posts, but reflector posts like https://de.wikipedia.org/wiki/Leitpfosten instead - but on both sides?
How about guardrails in curves (outer side) like in https://de.wikipedia.org/wiki/Schutzplanke ?

The "Bundesstrasse Four Lanes" also got boardwalks and info panels and so on - here I suggest a replacement of the boardwalk with a small tarmac stripe with white lines. The lamp posts can stay the same, but there should be guardrails on both inner sides of the lanes, so the lamp posts are between them. And also the reflector posts are needed here on the outer sides and guardrails in curves.

Same for the "Autobahn" but with guardrails all the time, inner side and outer side. And the replacement of the boardwalk should be a side stripe nearly as wide as a lane, with a white line. A random prop that should not occur too much would be a call box like https://www.google.de/search?q=notrufs%C3%A4ule&hl=de&pws=0&spell=1&sa=X&oi=image_result_group&ei=OFs6Vd65CYWhsAH41ICoBQ&ved=0CBQQsAQ&tbm=isch

The "Autobahn Ramp" also doesn't need boardwalks and props.


Edit:

I think boardwalks and sewage covers don't fit on a "Bundesstrasse"... they look wrong.

Edit:

I just discovered that the "Rural Roads" qwith zoning but without boardwalks can't elevate! Does the one depend from the other?