That's just a way to get traffic off the surface while work is done, though. The dowel bar retrofit is the work itself being done. I imagine a flyover ramp is

That's just a way to get traffic off the surface while work is done, though. The dowel bar retrofit is the work itself being done. I imagine a flyover ramp is more appealing in areas where there isn't a lot of alternate routes available. The US is considerably less dense than Europe so rerouting traffic while a section is closed for major work isn't a big deal. If it's going to last a while, we just pave over a section around the part being worked on.