Related Clues:
- Freeway array
- They get people into jams
- They create carbon monoxide
- Train set
- Lot fillers
- They're sold in lots
- Latter-day chariots
- Engine and caboose, e.g.
- 2006 Pixar film
- Road sights
- Gridlock ingredients
- Certain models
- Ends of 20- and 57-Across and 11- and 34-Down
- Turnpike rollers
- Mercury and Saturn, but not Earth