An overturned 18-wheeler closed the ramp from Woodall Rodgers to northbound US-75 in Dallas.
The crash is keeping Dallas drivers from interchanging from Interstate 45 to US-75 near the Klyde Warren deck park.
The truck came to rest on its side, spanning across the entire ramp. A tow truck was working to upright the truck around 11:45 a.m.
No other vehicles were reported to be involved in the crash.