This 'Both Lanes Closed' signal, also known as 6006.4, is a vital instruction displayed on UK motorways. It warns you that the lanes ahead are not open for travel, often due to incidents, roadworks, or dangerous conditions. You must obey these signals promptly, reducing speed smoothly and preparing to move to an open lane if directed.
Mastering the 'Both lanes closed' signal (6006.4) is vital for safe motorway driving and effective theory test revision. Understanding this warning helps you interpret traffic management instructions and prepare for potential changes on the road ahead, crucial for your Great Britain driving theory knowledge.
Motorway signals are live controls used to manage traffic, incidents, queues, lane closures, weather, and temporary restrictions. This signal applies to the lane, carriageway, or movement indicated by its position and display. Drivers should obey it promptly, check mirrors before slowing or moving lanes, and expect conditions ahead to differ from the normal motorway layout. It is listed in the catalogue as code 6006.4.
"Both lanes closed" is a motorway signal message or lane-control instruction. It may warn of changing conditions, control speed, close lanes, or direct traffic to leave the motorway.
Get clear, practical answers to the most common questions about the 6006.4 - Both lanes closed road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the British driving theory exam in Great Britain.
The 'Both Lanes Closed' signal indicates that the lane or lanes indicated by its position are not available for use. This is a live traffic control and can change rapidly. You must never enter a lane displaying a red X, which signifies it is closed.
When you see this signal, you should immediately check your mirrors and slow down smoothly. Prepare to move into an adjacent open lane if safe and necessary, or follow any directions given by the signal. Always expect conditions ahead to be different from normal.
For the theory test, remember that motorway signals are mandatory instructions. Ignoring a 'Both Lanes Closed' signal or a displayed speed restriction is a serious offence and a common reason for failing the test. Always prioritize safety and follow the instructions promptly.
No, you must not drive in any lane that is closed by a red X symbol or a 'Both Lanes Closed' message. This signal is a prohibition and entering a closed lane could lead to a serious accident. Wait for the signal to change or follow alternative directions.
This signal is used for various reasons including traffic incidents, accidents, roadworks, adverse weather conditions like fog or ice, or other unforeseen hazards. Motorway signals are dynamic and are used to manage traffic flow and ensure safety in changing circumstances.
A clear reference image of the 6006.4 - Both lanes closed road sign used in Great Britain.

The 6006.4 - Both lanes closed road sign may also be known by these alternative names or terms.
The 6006.4 - Both lanes closed road sign is part of the Great Britain Motorway Signals category, which groups together signs with similar rules and functions.
Reviewing signs that look alike, like this 'Both lanes closed' signal, sharpens your ability to distinguish between them. This direct traffic sign comparison aids memory and reduces errors during your theory test revision, helping you master similar road signs.

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Motorway signals are live controls used to manage traffic, incidents, queues, lane closures, weather, and temporary restrictions. This signal applies to the lane, carriageway, or movement indicated by its position and display. Drivers should obey it promptly, check mirrors before slowing or moving lanes, and expect conditions ahead to differ from the normal motorway layout. It is listed in the catalogue as code 6006.1.
Motorway signals are live controls used to manage traffic, incidents, queues, lane closures, weather, and temporary restrictions. This signal applies to the lane, carriageway, or movement indicated by its position and display. Drivers should obey it promptly, check mirrors before slowing or moving lanes, and expect conditions ahead to differ from the normal motorway layout. It is listed in the catalogue as code 6006.5.
After reviewing the full list of road signs, challenge yourself with practice questions focused specifically on sign recognition. Reinforce your learning and ensure you're fully prepared to identify and understand all traffic signs on the DVSA theory test.
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