In the UK, there is a guideline under Rule 169 of the Highway Code that addresses the responsibility of slow-moving vehicles. This rule asserts that drivers should not hold up a long queue of traffic, particularly if they are operating larger or slower vehicles. It strongly encourages those driving such vehicles to frequently check their mirrors and pull over to let other vehicles pass when they notice a considerable build-up of traffic behind them.

Several sources emphasize this rule and its implications. For instance, articles from both the Northern Echo and Somerset Live reiterate the importance of adhering to Rule 169, highlighting that it is a legal expectation for drivers of slow-moving vehicles to allow other vehicles to overtake when feasible. The RAC Drive also provides insight into how larger vehicles are affected by this rule and encourages drivers to be conscientious about traffic conditions.

Moreover, anecdotal evidence from forums indicates that many drivers of slow-moving vehicles, such as tractors, generally do pull over to allow those behind them to pass, although this may not always be practical on certain types of roads.

For those interested in further details, the following links provide additional information on this topic:

• Rail Forums Discussion
• Northern Echo Article
• Quora Discussion
• RAC Drive Legal Advice
• Reddit User Experience
• Highway Code Details

In conclusion, while there isn't a specific number of vehicles that constitute a "long queue," the legal framework clearly indicates that drivers of slower-moving vehicles should pull over to let faster traffic pass when safe and possible to do so.

Sources

If you are driving slowly should you pull over to let other traffic pass?Police issue Highways Code reminder to drivers of slow vehiclesCan you get pulled over in the UK if you drive slowly? - Quora16 Highway Code rules you shouldn't ignore | RAC DriveIn the UK tractors and slow moving farm vehicles must pull over and ...This is when slow moving vehicles should pull over - Somerset LiveRoad users requiring extra care - Other vehicles (219 to 225)

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