UK Motorways, Two Lane Slip Road Joins

6/3/2018 12:16:16 PM

There’s no restrictions, unless, as user16259 says, signs say otherwise.

However, note that there’s usually a spot where the line between the two lanes goes solid – after that you’re not allowed to switch between them. The yellow car in your Google link is breaking that rule!

You’ll also find that in some places the left lane doesn’t merge at all, but becomes an extra lane on the motorway (as with the junction in your link), and in others, where there is another junction soon after, that lane then splits off to become the off-slip for the next junction (e.g M3 J7&8)

6/3/2018 5:15:07 AM

Anyone may use either lane, unless signs tell you otherwise.

I can’t recall anywhere with signs giving restrictions, but if the slip is on an incline you might find slow lorries restricted to the left lane.

The purpose of staggered merging is safety. Drivers only have to think about one set of merging traffic at a time.

Credit:stackoverflow.com

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