barrier
closed
color
conductor
cross
crossing
danger
electric
fence
flat
gate
german
human
icon
isolated
junction
lane
level
light
line
locomotive
open
outline
pedestrian
pictogram
rail
railroad
railway
road
round
safety
security
signal
station
stop
subway
thin
top
track
traffic
train
tram
tramway
transport
truck
van
view
walker