Related Clues:

• Travel on foot
• Warning about people moving from side to side?
• Morning constitutional
• Word often seen in green
• Street sign ... or a hint to this puzzle's theme
• Duck ______
• Forgo the bus
• It might be intentional, in baseball
• Street signal directive
• Street corner sign
• Street-corner sign
• Four balls
• Send to base on balls
• Go on strike
• Wild pitcher's gift