A bridge connecting Russia and Alaska would not be a good idea. The bridge would be difficult to maintain, and very costly to build in the first place. Also, in the event of war between Russia and America, the bridge would be blown up to prevent the other side from using it. Lastly, there isn't a person alive who would want to drive over the sea to get to the other end of the bridge. Most people would fly there, or maybe take a ship. Driving there is not faster or more efficient.