Related Clues:

• Delays
• Uses the brakes
• Does some rubbernecking, say
• Travelers' headaches
• Hits the brakes
• Puts on the brakes, e.g.
• Reduces speed
• Loses steam
• Postpones
• Moderates
• Holdups
• Taps the brake
• Impedes
• Steps on the brake
• Enters a school zone