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Question

Difficulty: MediumExhaust Emissions and Noise Abatement

You are parked on a built-up residential road at 23:45 while waiting to collect a passenger. To comply with legal requirements regarding noise abatement and exhaust emissions, what should you do?

  1. A
    Sound the horn with a brief beep to alert the passenger of your arrival
  2. Switch off the engine and avoid using the hornAnswer
  3. C
    Keep the engine running at idle with the clutch pedal fully depressed
  4. D
    Rev the engine at regular intervals to prevent warning lights from displaying

Answer

Switch off the engine and avoid using the horn
Under The Highway Code (Rules 112 and 123), drivers must not leave a vehicle engine running unnecessarily while stationary on a public road. Additionally, sounding the horn is strictly prohibited when stationary and between 23:30 and 07:00 in built-up areas, except when another moving vehicle poses an immediate hazard. Switching off the engine and refraining from horn use complies fully with both exhaust emissions and noise abatement laws.

Step-by-Step Solution

1
Identify the statutory rules governing stationary vehicles and horn restrictions in built-up areas during night hours.
Highway Code Rule 123 prohibits stationary idling, and Rule 112 bans sounding the horn while stationary or between 23:30 and 07:00 in built-up areas (unless an immediate danger occurs).
These regulations are designed to minimize environmental pollution and prevent noise disturbances in residential neighborhoods.
2
Determine the required driver behavior when waiting in a parked vehicle under these conditions.
The driver must turn off the vehicle's engine and not sound the horn to alert a passenger.
Shutting down the engine completely stops exhaust emissions, and avoiding horn use respects the statutory night-time noise curfew.

Key Concept

Highway Code regulations on stationary engine idling (Rule 123) and built-up area horn curfew hours (Rule 112)
Estimated Time:1m 0s
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Topics

Exhaust Emissions and Noise Abatement

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