Related Clues:

• A lot may have lots
• Guys' chat topic
• Traffic, mostly
• Lincoln and Ford, e.g.
• Mercury and Saturn, but not Uranus
• Freeway array
• They get people into jams
• Train set
• Lot fillers
• Engine and caboose, e.g.
• 2006 Pixar film
• Road sights
• Firefighters
• Turnpike rollers
• Mercury and Saturn, but not Earth