It's no surprise to drivers around the Philadelphia region, but a new study shows that two of the nation's worst bottlenecks are in our area.Coming in at #36: the 0.8 miles on the Schuylkill Expressway between City Avenue and the Roosevelt Boulevard.Experts estimate that 700,000 hours a year are spent stuck in this spot.At #47: The 0.3 stretch of the Vine Street Expressway between the Schuylkill and the North 24th Street exit.300,000 hours a year are wasted in that very busy stretch.To see American Highway Users Alliance's full list, click here.