Related Clues:

• Commute lengtheners
• Long-legged beach birds
• Origami birds
• Causes of traffic jams ... or ways to avoid them
• Vowel-shaped construction supports
• Some are whooping
• Beam lifters
• Parts of many an urban skyline
• Tall construction machines
• Routes that contain the letters in 'routes'
• Routes that contain the letters in "routes"
• Some powerful building supporters
• Letter-shaped building girders
• Origami designs thought to bring good fortune
• Some weight lifters