Related Clues:

• Cockpit announcements: Abbr.
• Hellenic H's
• Some guesses, briefly
• Sts. and rds.
• Terminal figs.
• Numbered GPS lines
• Airport-board listings: Abbr.
• Brief guesses?
• Some are rural: Abbr.
• Station info
• US 101 & 66
• Platonic H's
• ''H'' look-alikes
• Weather may affect them: Abbr.
• LAX stats