Why do motorways have three lanes?

Driving along a three lane motorway, rule 264 states that "Always drive in the left hand lane, except when overtaking". When driving in the left hand lane, I have often wondered why TWO overtaking lanes are needed. Is there a reason?

Asked on 4 February 2014 by Mr. A.I.Solomon

Answered by Honest John

To create space for faster moving traffic, of course.

Tags: motorways

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