Related by context. Frequent words. (Click for all words.) 54 idle 51 idled 44 parked 44 stoplights 40 stoplight 40 pollution 40 nitrogen oxide 39 air pollution 39 carpooling 39 commuting 38 noise 38 loitering 38 smog 38 honking 38 busses 38 emissions 37 emission 37 downtime 37 NOx 37 commute 37 drunk driving 37 unattended 36 CO2 emissions 36 workday 36 hum 36 towing 36 impound 36 speeders 36 belching 36 noisy 36 carpool 36 speeding 36 dozing 36 polluting 36 workweek 35 commutes 35 driving 35 carbon dioxide emissions 35 nitrogen oxides 35 diesel 35 smoking 35 towed 34 gas guzzling 34 drowsy 34 congestion 34 nap 34 overloading 34 GHG emissions 34 greenhouse gas emission 34 rusting 34 snooze 34 picketing 34 sleepiness 33 tow trucks 33 greenhouse gas 33 emitting 33 cleaner burning 33 panhandling 33 screeching 33 impaired driving 33 daydreaming 33 cruising 33 traffic congestion 33 greenhouse gas emissions 33 naps 33 muffler 33 humming 33 cab 33 shutting 32 rush hour 32 workdays 32 snarled traffic 32 buses 32 drunken driving 32 shutter 32 traffic jams 32 shutdowns 32 gassing 32 preventive maintenance 32 sprawl 32 napping 32 honk 32 RIDE 32 sitting 32 rumbling 32 tow truck 32 mowing 32 tractor trailers 32 cranking 32 decibels 32 snow plows 32 fumes 32 cabs 32 taxis 31 Clean Air 31 seatbelt 31 sirens 31 pollutants 31 drivers 31 furlough 31 salaried employees