ahead
barrier
beware
black
board
careful
caution
crossing
crossroad
danger
dangerous
direction
drawing
emblem
engine
graphic
icon
illustration
isolated
label
locomotive
obsolete
old
placard
railroad
railway
red
road
roadsign
safety
sign
signpost
silhouette
steam
stop
symbol
technology
track
tracks
traffic
traffic signs
train
train station
transport
triangle
warning
way
white