bottleneck
brakes
bumper
car
city
clock
color
congestion
crawl
crowded
dioxide
drive
energy
environment
excess
freeway
full
gasoline
group
headache
highway
hour
jam
life
moscow
multiple
outdoor
people
pollution
population
power
pressure
road
row
slow
slowdown
social
speed
stopped
street
stress
time
too
traffic
transit
transport
urban
variation
vehicles
waiting