 The two-lane section of the freeway was expanded to its present four-lane configuration in 1969, the same year the US 340 freeway was completed between Jefferson and Frederick.US 15's present alignment from Point of Rocks to US 340 was also under construction by 1969.When the new highway opened in 1970, US 15 was moved to the new highway and joined US 340 in a concurrency along Jefferson National Pike from Jefferson to the Frederick Freeway.