I heard about this from a couple of students. I have wanted to go there for a while. When we stayed in Tokyo December 31st and January 1st, we had our chance. After breakfast at the hotel, three of us headed to the tunnel. That is when I fell asleep in the back seat. When I woke up we were at the rest area. It was pretty cool. There were lots of cars coming from Chiba...many more than coming from Tokyo. We had lunch a the food court. We didn't shop though. The toilets were C-L-E-A-N! And the views were magnificent. If you ever get hte chance I recommend that you take the time to visit Umi-hotaru.