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Difficulty: MediumLighting and Horn Usage

The Highway Code sets out specific legal requirements and safety guidance for the correct use of audible warnings, headlights, auxiliary lights, and hazard signals. Match each road situation with the appropriate use of vehicle lighting or the horn.

  • Parking a vehicle overnight on a through road where the posted speed limit is 40 mphMust display parking lights (sidelights) facing the direction of traffic flow
  • Slowing down abruptly due to a sudden queue or obstruction ahead on a motorwayMay briefly activate hazard warning lights to alert following drivers
  • Approaching a sharp, blind bend on a narrow single-track rural road in daylightMay sound the vehicle horn to alert unseen oncoming road users
  • Driving in daytime falling snow where forward visibility drops below 100 metresMust use dipped headlights and may activate front or rear fog lights

Answer

Parking overnight on a road with a 40 mph limit matches displaying parking lights (sidelights); slowing abruptly on a motorway matches briefly activating hazard warning lights; approaching a blind bend on a single-track road matches sounding the horn to alert unseen road users; driving in daytime falling snow with visibility under 100 metres matches using dipped headlights and optional fog lights.
Each scenario aligns directly with statutory requirements in the UK Highway Code: parking lights are legally mandated on roads with speed limits over 30 mph (Rules 249/250); hazard lights can be used briefly on high-speed motorways to warn following drivers of sudden queues (Rule 116); sounding the horn is permitted during the daytime to warn unseen road users at blind bends on single-track lanes (Rule 112); and dipped headlights combined with fog lights are designated for visibility below 100 metres (Rule 226).

Step-by-Step Solution

1
Evaluate night parking lighting regulations under Highway Code Rules 249 and 250.
Vehicles parked on roads with a speed limit exceeding 30 mph must leave parking lights (sidelights) on.
Street lighting on higher-speed roads may be absent or insufficient to ensure a parked vehicle is seen in time by approaching drivers.
2
Review the specific statutory exception for using hazard warning lights while in motion under Rule 116.
Hazard lights may be briefly used on motorways and unrestricted dual carriageways to warn trailing vehicles of severe deceleration or an obstacle.
This alerts high-speed following traffic quickly, preventing multi-vehicle rear-end collisions.
3
Assess audible warning principles under Rule 112.
The horn is used while in motion to inform other road users of vehicle presence, particularly on blind bends or narrow rural tracks.
It acts as a preventative warning where visual lines of sight are entirely blocked.
4
Determine the statutory definition and lighting requirements for seriously reduced visibility under Rule 226.
When visibility falls below 100 metres (such as in heavy falling snow), dipped headlights are mandatory, and fog lights are permitted.
Dipped beams make the vehicle visible without causing blinding glare reflected back from precipitation, while fog lights provide essential extra conspicuity.

Key Concept

Correct application of the Highway Code regarding stationary parking lights on fast roads, motorway hazard warning signals, daytime horn warnings on blind bends, and fog light deployment thresholds.
Estimated Time:1m 15s
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Topics

Lighting and Horn Usage

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