Hoover Dam on the motorway is 93 (Route 93), which lies in the meridional direction and connecting Arizona to the Canadian border.
Part of the highway adjacent to the dam does not match the line and the volume of the traffic.
The road has only one lane in each direction, streamers coming down to the dam, includes several steep and tight turns,
as well as places with poor visibility; the road is subject to landslides. The situation is expected to change with the introduction of
into operation in late 2010, the road bridge - Hoover Dam Bypass - through the Black Canyon.