Actually mate, he didnt have a choice. That is the scene where the idiot woman got herself hurt by debris because she was where she shouldnt have been, and sued paramount or Bay or one or the other I dont really remember, and Bay was no longer allowed to film there. Since that highway is the same detroit highway that the island had, it was simply replicated. I mean, it's a tiny detail, unless you had seen the island you never would have known.
But of course, filming WAS a major issue with this movie. bay said he wasnted to amke a scene with the wreckers ona race track, and you know all the stuff that would come with it but the only place he could get to, to film, denied his request, and so there goes that scene.
And if you woder why bay didnt just CGI the stuff he didnt have, it's because of 3 things. 1, he needs to have a foundation to work off of, 2 his computers are better than rotf(nimated devastor melted the insides of a computer) but still can go down, and 3 its very costly.