Possible Clues:

• From which presenter reads rolling news?
• Machine prompter
• Device displaying words to be read out
• Display for announcer reporting traffic tailback?
• Help for presenter in traffic jam, we hear?
• Help when presenting US car line on the radio
• Where a presenter might have words having reported heavy traffic?
• Prompt report of traffic jam?
• Prompt announcing traffic jam?
• TV presenter’s prompt