attention

change

cirle

cloud

control

crossing

crossroads

danger

direction

electrical

equipment

flash

focus

forward

glass

gray

highway

infrastructure

intersection

iron

journey

lamp

landscape

lights

line

long

orange

path

public

road

round

semaphore

sign

signal

sky

steel

stop

stoplight

three

tracks

traffic

transport

transportation

travel

two

urban

warning

way

winking

yellow