 All roads in the downtown grid system are streets ( e.g. 16th Street , Stout Street ) . Roads outside that system that travel east / west are given the suffix " avenue " and those that head north and south are given the " street " suffix ( e.g. Colfax Avenue , Lincoln Street ) . Boulevards are higher capacity streets and travel any direction ( more commonly north and south ) . Smaller roads are sometimes referred to as places , drives ( though not all drives are smaller capacity roads , some are major thoroughfares ) or courts . Most streets outside the area between Broadway and Colorado Boulevard are organized alphabetically from the city 's center . 
