ODESSA - Construction will start later this month on Loop 338.
The $5.5 million dollar project will add two lanes to the Loop to a five mile stretch between Yukon Road and Highway 385.
The project will take about a year to complete but officials say the impact on traffic will be minimal.
The speed limit in the work zone will be reduced to 65 miles an hour.
TXDOT wants to remind drivers to obey all signs and workers in the area.