Related Clues:

• Some arteries
• They all lead to Rome, in a saying
• Arteries with shoulders
• Wall and others
• Fair places
• Pikes, e.g.
• Main and Vine
• Where to find some collections of jams?
• Weather-map lines
• Pothole sites
• There are four hidden in this puzzle, which together suggest a familiar five-word saying (3,5,4,2,4)
• Indicators of equal pressure
• Some have forks
• Freeways, for instance
• High and low indicators