My friend John and I are always looking for rides near Dallas, especially if we can avoid Central Expressway and LBJ.
You can go west on Royal Lane until you get to Colwell Boulevard. Turn left and you will soon wind up at the junction of Colwell with Loop 348. Turn right a short distance and you will find yourself on Highway 114 headed west.
We did this ride on Sunday afternoon. There was quite a bit more traffic on 114 than we expected, including lots of trucks. We rode as far as Roanoak and turned around.
I am sure there are better rides.