change
changing
concepts
connection
cross
crossing
crossroad
danger
distant
forward
future
horizontal
industry
intersects
iron
isolated
journey
junction
lane
line
metal
nobody
outdoors
passage
pattern
rail
railroad
railway
road
section
separation
sleepers
spore
steel
surface
switch
thoroughfare
threedimensional
ties
track
train
traintrack
transport
transportation
travel
urban
variation
view
way
white