Possible Clues:

• Pushchair in US street — wave!
• He's in no rush, parking nice car at side of street
• First wheels, often
• One who is in no hurry to get around the 31 across, in short
• Pushchair's seen way before wave's given
• It's pushed in a park
• Infant's wheels
• Walker under way - wave
• Not needed during March, but will get around to the end of the street
• Walker's way with dice player