I-81 Overnight Lane Closures Begin Aug. 25 for Cable-Barrier Safety Project in Frederick County

A safety project on Interstate 81 in Frederick County will bring recurring overnight lane closures from Monday, August 25, 2025, through the end of the year. Crews will install a high-tension cable barrier in the median along a 20-mile stretch to help prevent cross-median crashes when vehicles leave the roadway.

Work will take place between mile marker 304.9 (just north of the truck weigh stations) and 324.9 at the West Virginia state line. Drivers should expect left-lane closures at night in various locations within this corridor. Contractors plan to start on the northbound I-81 and then shift to the southbound side as the project progresses.

The lane-closure schedule is as follows: Monday through Thursday nights, 8 p.m. to 7 a.m.; Friday and Saturday nights, 10 p.m. to 9 a.m.; and Sunday nights, 10 p.m. to 7 a.m. All work is weather permitting.

The $3.1 million project is intended to reduce the risk of severe collisions that occur when vehicles cross the median into oncoming traffic. A high-tension cable barrier is designed to absorb impact and redirect vehicles, adding a layer of protection for motorists traveling in both directions.

Because crews will be working overnight, motorists may encounter shifting work zones and changing closure points as installation moves mile by mile. Electronic signs and work-zone barrels will guide traffic through the affected areas. Drivers should slow down, merge early, and give road workers extra room. Expect brief delays and allow additional time if traveling through Frederick County during overnight hours.

While most daytime travel should be unaffected, the rolling nature of the project means some segments will see repeated night work as contractors complete installation, tensioning, and related tasks in each section. Weather can also affect scheduling; rain or storms may postpone work to a later night.

The initial focus on northbound I-81 means motorists heading toward West Virginia will see the first closures starting August 25. Once that side is complete in designated locations, crews will move to the southbound lanes, where similar left-lane closures will occur during the same nighttime windows.

This project covers a busy gateway at the northern end of Virginia’s I-81 corridor. With freight, commuters, and long-distance travelers sharing the road, officials are urging drivers to stay alert for night crews, follow reduced speeds posted in work zones, and avoid distractions.

The installation spans 20 miles, but will not be active every night across the entire length. Instead, closures will appear at specific work sites within the 304.9 to 324.9 corridor. Motorists can minimize delays by checking travel routes before evening departures, planning alternate times when possible, and watching for real-time advisories.

The work is scheduled to continue through late 2025. As crews rotate between locations and directions, drivers can expect intermittent nighttime impacts until the project is complete. All schedules remain subject to change due to weather and field conditions.

For those traveling at night along I-81 in Frederick County, the message is simple: be prepared for left-lane closures, obey work-zone signs, and use extra caution near crews and equipment. The result is designed to make the corridor safer for everyone who depends on it.

For updated traffic alerts and traveler information, dial 511 or visit https://511.vdot.virginia.gov/.