The Portal To Texas History has posted a ton of new aerials of Denton County, mostly from 1958.
This one shows US 77 as an at-grade expressway thru Lake Dallas:https://texashistory.unt.edu/ark:/67531/metadc1585692/m1/1/zoom/?q=denton&resolution=8&lat=2791.2838119287116&lon=5180.27594763878 (https://texashistory.unt.edu/ark:/67531/metadc1585692/m1/1/zoom/?q=denton&resolution=8&lat=2791.2838119287116&lon=5180.27594763878)