You have no obligation to let traffic merging from the left in . Would depend if he hit you or you hit him though I would have thought . If he's 9/10ths out and you hit him questions might be askedRight... so I'm in traffic they come up the empty lane that merges and they don't check their speed and are alongside me and just refuse to stop cutting in? So I have to stop and let them in or keep going and they go into me?
Of course I let them in but it just got me thinking it would be handy timing to get my car written off.