Am 08.09.2015 um 21:05 schrieb Phil W Lee:
The difference between those types of dashed markings is advisory.
Where there is a mandatory restriction of crossing the centre line, it
will be doubled, with at least one of the lines being solid. If only
one line is solid, the restriction applies if it is the one closest to
you, and if they are both solid, you cannot cross from either side.

The 'double solid lines' is not an agreed standard of the Vienna
Concention but an optional extension. Germany uses double solid lines
only on multi-lane roads to distinguish the difference between driving
directions (where a single solid white line might be used to separate
normal lanes from turning lanes).

Also, the usage of yellow lines for edge-of-road markings is not defined
in the convention.

The solid lines first mean "no overtaking here" (where overtaking is
defined to be overtaking a moving vehicle with more than one lane of
tires, i.e. bicycles and motorbikes may be overtaken but motorbikes may
not overtake cars), secondly the mean "do not cross the solid line in
normal operation" and thirdly they mean "no parking".

So with solid lines, car may overtake bicyles but they may not crosse
the center line while overtaking (motor bikes may not legally overtake
cars even if thes stay inside the lane which is generally ignored).
Cars must stay behind moving horse-drawn carriages or agricultural
vehicles - imagine a 60 mph road going over a blind hilltop where you do
not see oncoming traffic.
With solid lines, mail trucks must not stop at mail boxes (or
contrarily, there must not be solid lines in areas where mail is
delivered by truck - parcel deliveries are known to ignore all rules of
the road on parking anyways) but if a parcel delivery stops in areas
with solid lines, you are allowed to cross the solid line with
exceptional care.