State Street in Salt Lake City runs South from the Utah Capitol building in Salt Lake City to Draper. It is about 22 miles in length. State Street is one of the longest commercial thoroughfare in the country.
I have actually found State Street to be one of the better bicycle routes from the South Valley into downtown. The southern end of State Street, where the road is preparing to merge into the Interstate is the most dangerous section for bikes. The little dip at 7400, where State Street drops below the Trax line is also a little bit of challenge. The road narrows and you have to take a full lane.