Clark County starts study in southwest valley Posted on April 16, 2019 by Las Vegas 1 Las Vegas Las Vegas News & Search 1 News - 1 eMovies - 1 eMusic - 1 eBooks - 1 Search Search for: Clark County started a traffic study in the southwest valley. 1 Las Vegas Las Vegas News & Search 1 News - 1 eMovies - 1 eMusic - 1 eBooks - 1 Search Search for: