The accident is located about 1 mile south of Coronado's Camp. The truck completely blocked all lanes of traffic until about 9 p.m..
TxDot crews now have one lane open and are alternating north and south 277 traffic through one lane past the accident.
A spokesperson for the ECCA volunteer fire department told KTXS News that it may be 4 to 5 hours before the highway is completely clear.
The truck driver was not injured.