Texas State Highway 78

State Highway 78
Route information
Maintained by TxDOT
Length:	90.83 mi (146.18 km)
Existed:	1926 – present
Major junctions
South end:	I-30 in Dallas
	I-635 in Garland US 380 in Farmersville US 69 in Leonard US 82 in Bonham
North end:	OK 78 at Texas–Oklahoma state line
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec ← SH 77 SH 79 →

I-635 in Garland
US 380 in Farmersville
US 69 in Leonard

State Highway 78 or SH 78 is a state highway that follows surface roads in a predominantly southwest-to-northeast direction in the Dallas area before traveling 90 miles (145 km) north-northeast to the Oklahoma State border.

The highway's southern terminus is at Interstate 30 in Dallas. From there, it follows Grand Avenue along White Rock Lake and then Garland Road into Garland as it passes Interstate 635. In downtown Garland, Highway 78 follows the central streets of Avenues B and D before joining Lavon Drive and moving northeastward.

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Wikipedia