40 Spur was designated to Forest. The Gainesville to Dallas portion became US 77 in 1929. In 1932, the Dallas to Jacksonville stretch had become part of US 175. The last remaining portion of old SH 40, Jacksonville to Port Arthur, became part of US 69 in 1934. On September 26, 1939, SH 40 was cancelled in favor of these US Highways. The SH 40 Loop and SH 40 Spur routes were renumbered as Loop 12 (Dallas), Spur 29 (Forest), Loop 36 (Keltys), and Spur 65 (Baxter). SH 40A was a spur route proposed on September 16, 1926 going from St. Augustine south to Zavalla. This route was actually designated as SH 8B instead(now SH 147). Interstates 35E and 35W roughly follow the old SH 40 routes from Dallas and Fort Worth, respectively, to Denton, and the old route from Denton north is approximated by Interstate 35. Major intersections References 040 Transportation in Brazos County, Texas